At the school level, Biology is taught as a largely descriptive subject with almost no exposure to quantitative reasoning. The presentation of biology at school is in stark contrast to how modern life science is practiced. Consequently, it is essential that students get introduced to quantitative techniques early in their undergraduate biology education. Quantitative thinking for biologists will serve two complementary objectives. First, it will highlight the important of quantitative methods and data handling in the life sciences. Second, it will enable students to carry out basic quantitative tasks. The R programming environment will also be introduced for data handling and plotting.