The document outlines different levels of understanding for a science module on reproduction. Level 3 covers basic knowledge of why mammals reproduce and the stages of the human lifecycle. Level 4 identifies reproductive organs and knowledge of fertilization. Level 5 expands on reproductive organs and their functions, as well as how the fetus obtains nutrients. Level 6 explains how egg and sperm cells are specialized and how toxins can affect the unborn baby. The student's target is to identify 3 areas from the unit to work on.