Publications & Resources

Our faculty, students and researchers work together everyday to contribute to a better world by grappling with urgent problems we are facing in India. We conduct rigorous work to produce high quality learning resources and publications to contribute to public discourse and social change. Here, we feature a sample from our work for everyone to access. You can explore featured resources, policies, and the latest publications from the University. 

To explore all the work of our University, please visit our publications repository.

  • Issue 9 Cover
    Published
    Authors

      Abstract

      पाठशाला भीतर और बाहर के अंक 9 में बच्चों को पढ़ना-लिखना सिखाने की शुरुआत और आगे इसका विस्तार कैसे किया जा सकता है इस पर लेख हैं। कुछ अन्य लेख गणित शिक्षण से जुड़ी मान्यताओं, और ये मान्यताएँ शिक्षण और सीखने को कैसे प्रभावित करती हैं, पर केन्द्रित हैं। सामाजिक अध्ययन की कक्षा में परस्पर विरोधी मुद्दों पर की गई चर्चा कैसे बच्चों में आलोचनात्मक सोच विकसित करती है, से जुड़े लेख भी इस अंक में हैं। एक‑दो लेखों में लॉकडाउन के दौरान बच्चों व शिक्षकों के लिए आयोजित की कई कक्षाओं के अनुभव साझा किए गए हैं।

      इस अंक में समावेशन और समानता से सम्बन्धित दो लेख हैं। पहले लेख में शिक्षक‑शिक्षा पाठ्यक्रम के अन्तर्गत जेण्डर संवेदनशील शिक्षण क्यों व कैसे’ की पड़ताल की गई है। दूसरा लेख जनजातीय बच्चों को शिक्षा के दायरे में लाने और उनके लिए सीखना सम्भव बनाने के बारे में है। इस अंक का साक्षात्कार, अनुराग बेहार से राष्ट्रीय शिक्षा नीति 2020 के मूलभूत तत्त्वों पर टुलटुल बिस्वास द्वारा की गई बातचीत पर आधारित है। पुस्तक चर्चा में जिस किताब की चर्चा है, उसका नाम है- एक स्कूल मैनेजर की डायरी

      Issue- 9 includes a range of articles on importance of and teaching of reading and writing to children. These explore how reading and writing maybe initiated and then furthered. Other articles touch upon beliefs about teaching of mathematics and how they impact teaching and learning and on how classroom discussion on conflicting issues in Social Science help develop critical thinking. Some other articles focus on the sharing experiences of organizing classes for children and for teachers during the lockdown. 

      There are two articles related to issue of inclusion and equity in education. One on of them explores why and how of Gender education in context of teacher education curriculum and the other is about education of Jan Jati children and making learning possible for them. The interview in this issue is with Anurag Behar and focuses on the foundational elements of the National education policy 2020. And the book discussed in the issue is Ek School Manager kii dairy’.

      More →

    • LC i10 cover
      Published
      Authors

        Abstract

        The articles in this issue are broadly based on the two aspects of play in learning – the innumerable lessons that are learnt from play – teamwork, strategy, inclusion, respect, sharing, handling fights, settling arguments, addressing bullying, and second, how play can be used as pedagogy for circular learning as well as structured activities such as educational videos and unstructured ones like pretend play. The idea behind both is to nurture the free spirit with which child must learn.

        More →

      • Magazine

        i wonder… Issue 6

        in Azim Premji University

        Iwonder june2021
        Published
        Authors

          Abstract

          Does the teaching and learning of science change when we give importance to relationships with people, other beings, and the places they inhabit? 

          How do we use an exploration of water to help children connect basic science concepts with personal experiences and pressing environmental issues? 

          Can observing, exploring, and working in their natural environment offer children and teachers the opportunity to cultivate an intuitive understanding of the nature and process of science? 

          What personal choices and simple actions in our everyday lives can help us begin engaging with climate change? 

          Join us in exploring these questions in the theme section of this issue — Teaching as if the Earth Matters.

          More →

        • Pathshala Issue 8 Cover
          Published
          Authors

            Abstract

            इस अंक में 16 लेख हैं और इनमें अधिकांश लेख पढ़ना सीखने और उसमे रुचि पैदा करने पर आधारित हैं। शिक्षकों और शिक्षक‑प्रशिक्षकों द्वारा लिखे गए कक्षा अनुभवों और शिक्षणशास्त्र पर आधारित लेख, शिक्षण में बच्चों की भागीदारी बढ़ाने के तरीकों के विभिन्न पहलुओं को सामने लाते हैं। बच्चों को पढ़ना सीखने और उनकी लिखित अभिव्यक्ति विकसित करने में मदद के लिए, स्कूल व कक्षा में क्या किया जा सकता है, इसके बारे में विचार देते हैं। किताबों और पुस्तकालय से, डायरी लेखन व दीवार पत्रिका से, पढ़ने-लिखने की सामग्री से और बातचीत व कहानी कहने से सीखने में मिलने वाली मदद के विवरण भी इन लेखों में मिलते हैं। इस अंक का संवाद भी शुरूआती पढ़ना, लिखना, साक्षरता, संख्यात्मक और गणितीय ज्ञान पर केन्द्रित है। लेख यह भी दर्शाते हैं कि जब बच्चे पाठ्यपुस्तकों के अध्यायों पर काम कर रहे हों तो उन्हें बात करने और अपने विचार व्यक्त करने की पूरी आज़ादी होना चाहिए। 

            शिक्षक के साथ साक्षात्कार महामारी के दौरान बच्चों के साथ जुड़े रहने के प्रयासों का विश्लेष्ण प्रस्तुत करता है। एक अन्य लेख महामारी के दौरान बच्चों के अपने स्कूल के साथ सम्बन्धों की जटिलता को सामने लाता है।

            This eighth issue of Pathshala carries 16 articles. Learning to read and write is the foundation of all further learning. Most of the articles in this issue are focussed on learning to read and building of interest in it. The Samvaad is also focussed on ‘ Early reading, writing, literacy, numeracy and other mathematical knowledge’. Based on classroom experience and pedagogy the articles written by teachers and teacher educators bring out various aspects of the manner of engaging children and give ideas about what can be done in the school and in the classroom for helping children to learn read and develop their written expression. The articles bring out the changing role of the reader at different stages of the reading process, how working with the library and books, diary writing, Deewar Patrika (Wall magazine), availability of material to read and write, conversation and storytelling etc. help in learning and how peer learning, conversations with and among children help in this process. They point out that children should also be given freedom to talk and express when they are working with chapters from textbooks. The interview with the teacher presents an analysis of the efforts to continue to engage with children during the pandemic. One article of a different genre brings out the complexity of the relationship of children to their school as exposed by the pandemic.

            More →

          • LC April2021
            Published
            Authors

              Abstract

              A lot of thought has been applied by individuals, teachers and organisations across the country to give the principles of responsible citizenship and shape in the minds of our children. All the articles in this issue show how dedicated have been the attempts to use the classroom to implant and nurture the ideas consecrated in the Preamble of the Indian Constitution.

              More →

            • ARA March2021
              Published
              Authors

                Abstract

                Isn’t mathematics simply divine? Not an unexpected line from the At Right Angles team but one that we will back up with our Features article from the March 2021 issue: Geometric Constructions from the Sulvasutras. It’s an incisive dive from there to the Utilitarian Math World but your disillusionment will be healed with delightful articles on understanding some of the whys of procedures and rules in mathematics such as the divisibility rules, the square root algorithm, the formula for the median and the folk method to find the height of a tree.

                We bring you a new first with this issue: for the first time, AtRiA goes beyond its covers with three additional articles available only in the online mode. A big shout out to the numerous submissions which enable us to take this leap.

                Do revert with your feedback on AtRiA.​editor@​apu.​edu.​in

                More →

              • LC Dec2020
                Published
                Authors

                  Abstract

                  COVID-19 made it clearer than ever that the school does not and cannot be looked at in isolation from society. In this issue, there are articles that show not only teachers supporting children’s learning during the closure, but also how parents overwhelmingly supported teachers to continue their work; how, when all other ways of distance learning failed, the unanimous decision of parents was that the education of their children should go on.

                  More →

                • RA Issue 8 Nov 2020 English Cover Page
                  Published
                  Authors

                    Abstract

                    Beyond Four Walls — Contain a mathematician in a room and you can be sure that some thinking on quadrilaterals will happen! Our second issue during the pandemic has much to keep you absorbed and happily engaged with problems- of the mathematical kind. From age digit reversals to an algorithm for evacuating a room — there is material for every age group. We begin with the all important question: Why Should You Study Mathematics? And we also carry a review of the Classes I‑III Sikkim Mathematics Textbooks, the development of which our URC-PDP played such a key role in. Do revert with your feedback on AtRiA.​editor@​apu.​edu.​in

                    More →

                  • Magazine

                    i wonder… Issue 5

                    in Azim Premji University

                    Iwonder oct2020
                    Published
                    Authors

                      Abstract

                      This issue is focused on the Pandemic. Read The Basics’ section to explore: what strategies do epidemiologists use to control the spread of infection? Are viruses the most complex or the simplest forms of life? What has caused the spike in frequency of new zoonoses since the 20th century? In The Infection’ section, engage with questions like: why do we believe that SARS-CoV‑2 is a product of natural evolution? How exact are measurements of death rates for an ongoing pandemic? Or, how does the nature and context of social interaction affect the spread of COVID-19? Delve into Our Response’ section to read: why designing’ and making’ vaccines against SARS-CoV‑2 is uncertain and time-consuming? What can we learn from deliberately exposing healthy consenting individuals to a weakened form of the SARS-CoV‑2 virus? Which tests would be most effective for contact tracing & which for population-wide screening? How do we identify antivirals against SARS-CoV‑2? Can community health workers clinically diagnose COVID-19 syndrome in the absence of testing kits? Why is training and provision of personal protective equipment for ASHA workers essential for effective healthcare? How can a reverse quarantine approach help us use herd immunity to our advantage? That’s not all. Are you looking for resources on understanding concerns & approaches towards the mental health of the elderly, children, and those under quarantine? Or mythbusters around SARS-CoV‑2? Check out our Snippets.

                      More →

                    • LC issue7 1
                      Published
                      Authors

                        Abstract

                        This issue proves that children can, and do, learn, provided they get the encouragement, support, respect and dignity that is due to them during the process and after. The response got for the topic was so overwhelming that it led to the creation of a second part.. It is all about children learning. and enjoying themselves in the process, rather than just getting a formal education.

                        More →

                      • ARA July2020
                        Published
                        Authors

                          Abstract

                          As the world goes through lock down and social distancing, it is easy to feel less and less a part of the whole and more and more a small, isolated part. But that does not make us or anybody else, any less a part of the whole and we need to realise that every part of the whole matters. 

                          But are all the parts of the whole equal? If not, what can we do to redress the balance?

                          Think mathematically!

                          More →

                        • Magazine

                          i wonder… Issue 4

                          in Azim Premji University

                          Iwonder may2020
                          Published
                          Authors

                            Abstract

                            What does evolution by natural selection mean? How does survival of the fittest’ explain the transformation of male clownfish into females? Or the many non-combative, non-competitive, and seemingly friendly interactions observed between ants and plants? Does it provide clues to the identity of the mysterious descendants of dinosaurs in today’s world? These are some of the questions we explore in our theme section Evolution revisited’. In Annals of History, relive unsung surprises in the process of discovery of penicillin with interactive resources designed for the science classroom. How do we use pendulums to illustrate fundamental concepts in mechanics? How do we recognize and clarify incorrect student conceptions of the science of everyday phenomena? Find out with the detachable activity sheets & concept builders in The Science Lab’.

                            More →

                          • Learning Curve Issue 6 April 2020 Cover
                            Published
                            Authors

                              Abstract

                              Children are, first and foremost, individuals and so it follows that their developmental patterns are influenced by environmental conditions. With even twins differing in their abilities and milestones, it is near impossible to predict at what rate a child will learn. Thus children enter school with a wide range of abilities — and therefore possibilities.

                              However, the assumption that all children can learn the basic curriculum at the same pace, in the same way and to the same extent and level- is unsupported either by research or by personal experience. If we agree that children have varied strengths (multiple intelligences) the it surely follows that teaching methods have also got to vary correspondingly and that there have got to be multiple teaching styles.

                              This issue addresses many of these concerns and to do that we have a wide range of articles from writers across the country which establish resoundingly that every child can indeed learn — only it requires empathy and compassion from the teacher to make it happen.

                              More →

                            • RA Issue 6 March 2020 English Cover Page
                              Published
                              Authors

                                Abstract

                                Vision 2020 – As we move into the 9th year of AtRiA’s existence, we refocus for clarity. The March 2020 issue talks about Breaking Down Barriers: A Mathematical Approach. Launch right into the how and what with B. Sury’s article on Tiresome Paths, Water Gates and Euler’s Formula. But there’s more than networks and circuits here, starting with this issue, we will be focusing sharply on the challenges and difficulties of the average mathematics teacher and hoping to share and discuss strategies to help those who struggle with the nature and pedagogy of mathematics.

                                We have some wonderful material to draw you in- Conversations on the Greatest Common Divisor, Trials with Triangles, Impossible Triangles on Dot Sheets and some great Search Problems for the Middle School to mention a few. We start a new section called ViewPoint and continue with our photo series Captured Mathematics. TechSpace features the free dynamic geometry software Robocompass and our PullOut is on Angles. Our review this time is on the Mathematics of India.

                                More →

                              • Pathshala Issue 4 Feb 2020 Cover Page
                                Published
                                Authors

                                  Abstract

                                  पाठशाला भीतर और बाहर के अंक 4 में एक लेख देश में महिला शिक्षा की पड़ताल करता है। एक अन्य लेख बचपन के अर्थ पर सवाल उठाता है और पूछता है कि क्या शिक्षा का एक मात्र उद्देश्य एक आदर्श बच्चे का विकास करना है; पत्रिका में शामिल एक और लेख शारीरिक दण्ड के सदियों पुराने सवाल की समाजशास्त्रीय पड़ताल करता है और एक दूसरे लेख का पहला भाग भारतीय शिक्षा पर मैकाले के प्रभाव की जाँच करता है। इस अंक के दो अनुभव आधारित लेख कविता कहानियों के माध्यम से भाषा शिक्षण के रुचिकर तरीक़े सुझाते हैं। संवाद में शिक्षकों व शिक्षक- प्रशिक्षकों के साथ मूल्यांकन और परीक्षा के विभिन्न पहलुओं पर बातचीत है। दो-एक लेख शिक्षा से जुड़ी नीतियों और इनके अमल में आने वाले मुद्दों की आलोचनात्मक पड़ताल करते हैं।

                                  The fourth issue of Pathshala ..” has an article that examines women’s education in the country; an article that interrogates the meaning of childhood and asks if the only purpose of education is to develop an ideal child; an article that examines the age old question of corporal punishment sociologically; the first part of an article that examines Macaulay’s relationship with/​impact on Indian education; there are two experience based articles on interesting ways to teach language using stories and poems; and a discussion among teachers and other educators around assessments and examination. Some of these articles critically examine policies and the issues in their application.

                                  More →

                                • Learning Curve Issue 5 Dec 2019 Cover
                                  Published
                                  Authors

                                    Abstract

                                    In this issue, we have a wide range of articles from writers who have looked at children with disabilities in a variety of ways- but through the same lens: inclusion. There are articles tracing the history of different organizations which have worked for several years to create opportunities for the education of children with disabilities, language acquisition, travel, opportunities for independence and respectful acceptance, among others.

                                    More →

                                  • RA Issue 5 Nov 2019 English Cover Page
                                    Published
                                    Authors

                                      Abstract

                                      AtRiA, November 2019 focuses on journeys ‑some are enjoyable, some tiresome, some endless. A mathematician’s journey is full of unexpected delight, simply because of unexpected detours, sudden discoveries and interesting alternatives. Have fun as you travel with us. Read all about the young Yatris and their journey of discovery in Features. This section also describes more abstract journeys from the Regular Pentagon to the Icosahedron and the Dodecahedron (Part 2) and from the familiar 2 and 3 dimensions to n dimensions in Extension of the Pythagorean Theorem. In ClassRoom, Simple Cryptography and Triangles with Integer Sides are articles sparked off by previous articles in AtRiA . An Unusual Proof of the Centroid Theorem, Modified Pascal Triangle and Orthocentre of a Triangle may motivate you to write similarly! You will find ideas in our regular columns – How to Prove It, Low Flow High Ceiling and TechSpace which features the simulation of a dice game this time. Our issue is short of 100% without the PullOut, enjoy the learning trajectory on Percentages, defined and illustrated with plenty of examples in this issue. How Craig Barton Wishes he’d Taught Maths is an excellent review by Sir Timothy William Gowers, reprinted from his Weblog.

                                      More →

                                    • Pathshala Issue 3 Aug 2019 Cover Page
                                      Published
                                      Authors

                                        Abstract

                                        पाठशाला भीतर और बाहर का तीसरा अंक स्कूली शिक्षा के दो महत्त्वपूर्ण सरोकारों पर चर्चा व विश्लेषण करता हैं- रटन्त पढ़ाई का मसला और सही मायने में सीखने का सवाल। शारीरिक दण्ड के ऐतिहासिक और दार्शनिक आयामों पर भी इसमें एक लेख शामिल है। इस अंक में कुछ अनुभव आधारित लेख भी हैं जिनमें एक ग्रामीण परिस्थितियों में शिक्षक की निर्मिति पर, एक स्कूल हेडमास्टर की यादों पर और एक इस बात से सम्बन्धित है कि हम बच्चों को कितना समझते हैं। भारत में शिक्षा के विकास पर लेख की ऋंखला इस अंक में भी जारी है क्योंकि इसमें यात्रा के एक महत्त्वपूर्ण कालखंड के अध्ययन को प्रस्तुत किया गया है। हर अंक की तरह इस अंक में भी शिक्षकों से साक्षात्कार और पुस्तक चर्चा जैसे स्थाई स्तम्भ शामिल हैं। 

                                        The third issue has articles that discuss and analyse two important concerns of school education – the question of rote memorization and actual learning. There is also an article on the historical and philosophical dimensions of corporal punishment. There are interesting experience-based articles – one on the process of making of a teacher, one on the reminiscences of a school headmaster and another related to how much we understand children. The series on the development of education in India continues as it covers an important period in that journey. Then there are regular columns like interview with a teacher and book reviews.

                                        More →

                                      • Learning Curve Issue 4 Aug 2019 Cover
                                        Published
                                        Authors

                                          Abstract

                                          It is certainly a platitude to say that learning can happen everywhere and at all times, at the most unexpected places and moments in our lives. However, that said, we also recognise that the school is a very valuable place of learning: formally and systematically in a graded way,level upon level so that we can tackle end-of-stage examinations which help us to choose our futures. But while all this is happening, a lot of undocumented and stimulating learning is going on simultaneously,
                                          In this issue, articles on experiential learning about the environment, reading as a means of expanding horizons as well as acquiring language skills, the morning assembly as a treasure house of the learning experience- are all here. Other articles have given detailed accounts of science as a dispeller of superstition and an enhancer of a spirit of enquiry and curiosity. Sports do more than just teach the rules of the game, suggests an article: they can internalise values, inculcate inclusion and gender equality. There is an array of perspectives on the learning within learning which, paradoxically, falls outside of it.
                                          All in all, this issue confirms what has long been felt and known — the learning that occurs outside the classroom is as vital as the formal pedagogy which takes place inside.

                                          More →

                                        • Magazine

                                          i wonder… Issue 3

                                          in Azim Premji University

                                          I wonder Issue 3 Aug 2019 FR
                                          Published
                                          Authors

                                            Abstract

                                            Explore big questions around 4 themes: black holes, the wound healing capacity of the skin, Higgs bosons, and the matrix of life. 

                                            Use the activity sheets in A milky way to learn biology’, What do we really see’, and Trees and seasons in a changing world’ to introduce students to thinking like a scientist, the human vision, and neighborhood trees. 

                                            Discover how astronomers measure distances in space in our new section How do we know?’ Explore how engaging students in raising an urban terrace farm can strengthen their understanding and involvement with the local environment in Pedagogy of dirty hands’. 

                                            Try out the concept builder from Physics for closeted Aristotelians’ to find out how well your students understand motion under gravity. 

                                            Read our Research to practice’ section to discover how to create embodied learning experiences for students in the science classroom. Or learn more about the first image of a black hole in our section Hot off the press’.

                                            Looking for more? Enjoy our pull-out poster on human skin and booklet on identifying 10 common trees.

                                            More →

                                          • RA Issue 4 July 2019 English Cover Page
                                            Published
                                            Authors

                                              Abstract

                                              The July 2019 issue features Fractals on the cover — those distant and beautiful and highly mathematical creations have been brought a click away in our TechSpace section. Enjoy creating them and adding to your repertoire. We also take you through the magical tour of the beauty of mathematics starting with an article on Pentagons. Pi enters the ClassRoom section and the primary has plenty of learning — have fun joining the dots and exploring geometrical figures with different lenses. Students share their mathematical findings in two exciting articles. Our pedagogy article helps you to Understand Learners’ Thinking. And the Middle School problem corner is a Do_​It_​Yourself hands on problem solving section. The PullOut is on Ratio. 

                                              More →

                                            • Learning Curve Issue 3 April 2019 Cover
                                              Published
                                              Authors

                                                Abstract

                                                This issue focusses on Textbooks and their significance in learning, how they are created, the ways they have been used and how they can be improved upon. The articles are based on classroom experience and as such are relevant and universal. Much thought has gone into the perceptive analyses by the authors, who have considered the full impact and importance of the power of textbooks.

                                                More →

                                              • RA Issue 3 March 2019 English Cover Page
                                                Published
                                                Authors

                                                  Abstract

                                                  The March 2019 issue is packed with articles for students, teachers and teacher educators of all classes. Striking results are not just reported, they are also explained and justified with proofs. And our sources vary from students to observations from colleagues in mathematics classrooms and mathematical tricks from websites- these are explored and explained.

                                                  More →

                                                • Pathshala Issue 2 Feb 2019 Cover Page
                                                  Published
                                                  Authors

                                                    Abstract

                                                    पाठशाला भीतर और बाहर के अंक 2 में भारतीय शिल्प व चित्रकला में, शिक्षण सम्बन्धी चित्रों के बारे में लेखों की दिलचस्प ऋंखला शृंखला का पहला भाग शामिल है। यह लेख शिक्षा के रोचक इतिहास के एक पहलू को खोलता है। इस अंक में विज्ञान शिक्षण पर दो अन्य लेख हैं, जो इस विषय में कुछ काम करने प्रयासों और विज्ञान सीखने में मिलने वाले आनन्द व जुड़ाव की बात करते हैं। एक लेख फ़ेल न करने की नीति और इसकी ग़लत व्याख्याओं के बारे में है। एक लेख में शिक्षक की पहचान व स्थिति की पुनर्कल्पना करने की आवश्यकता, इसमें स्कूल नेतृत्व की भूमिका और चुनौतियों की चर्चा है। इस अंक में भाषा शिक्षण और सीखने के पहलुओं पर अध्यापकों से बातचीत भी शामिल है। महत्त्वपूर्ण भाषाओँ पर अंग्रेज़ी की पकड़ कैसे बनी, इसके विश्लेषण पर आधारित एक लेख भी इस अंक में शामिल है। 

                                                    The second issue of Pathshala..” carries the first part of a very interesting series on schools as they were. The article brings out in an interesting manner how we come to know about what happened in earlier times. Two other articles on science teaching talk about the effort of making something work and the joy and engagement it brings to learning science. There are articles that discuss the policy of non-detention and the way it is mis-interpreted, the need to re-imagine the identity and status of the teacher, what role does school leadership play in it and the challenges the leadership faces. The conversation with teachers is on dimensions of language teaching and learning. There is also an article that analyzes the way English has captured the place of the most important language.

                                                    More →

                                                  • Magazine

                                                    i wonder… Issue 2

                                                    in Azim Premji University

                                                    I wonder issue 2
                                                    Published
                                                    Authors

                                                      Abstract

                                                      Explore three Emerging Trends in Chemistry’ – new elements, metal-organic frameworks, and fluorescent tags. Read Serendipity’ & Annals of History’ to re-live the exciting jigsaw-puzzle-like process of scientific discovery – whether of a novel protein or the structure of DNA

                                                      Engage with the process of encouraging peer instruction in the science classroom through Students as Teachers’, or use our activity sheet Early Bird Nature Detectives Bingo’ to get students to observe (non-human) life in their backyards. 

                                                      Use our Science Lab’ section to get your students to calculate their molar masses (!) or understand pressure and volume through simple experiments with easily available low-cost materials. 

                                                      Discover the chemicals in everyday phenomenon through The Scent Orchestra of Flowers’ & The Chemistry of Life’. 

                                                      Explore the concept of energy from three very different perspectives with The Mystery of Dark Energy’, Powering (human) Life on Earth’ & Clean Energy’. Plus, enjoy our two pull-out posters on Doppler Effect’ and Some interesting scents of flowers’.

                                                      More →