Presented in English and French, Biology 20-30 is an academic program that helps students in Alberta, Canada, better understand and apply fundamental concepts and skills. The major goals of the program are: (1) to develop in students an understanding of the interconnecting ideas and principles that transcend and unify the natural science disciplines; (2) to provide students with an enhanced understanding of the scientific world view, inquiry, and enterprise; (3) to help students attain the level of scientific awareness essential for all citizens in a scientifically literate society; (4) to help students make informed decisions about further studies and careers in science; and (5) to provide students with opportunities for acquiring knowledge, skills, and attitudes that contribute to personal development. This booklet includes information on general and specific learner expectations and units on: the biosphere; energy flows and cellular matter; energy and matter exchange in ecosystems; energy and matter exchange by the human organism; reproduction and development; cells, chromosomes, and DNA; and change in populations and communities. Each unit outlines the major themes, concepts, and the understanding, skills, and interrelationships among science, technology, and society that students should be able to demonstrate. (JRH)