The following lesson has as an objective to review the three main theories of evolution: Fixism, Lamarckism and Darwinism (Natural Selection). The presentation starts with some definitions of concepts that must have been acquired for now and may be helpful. It continues with a question in order to rise previous knowledge about evolution and how it happened. Then, the three theories are studied with examples and definitions. The one that has more content is Darwinism because the types of selections (stabilising, directional, disruptive and artificial) are shown with graphs. As closure, a small question is made about antibiotic resistance and a fun evaluated activity is proposed in order to evaluate the theories of evolution.