This is the first of two Science NetLinks lessons in a short series on cells. In this lesson, students compare a plant and animal cell and then make a model of a cell. They select items to represent various cell structures and justify their choices by describing how the items they have chosen represent the actual parts of a cell. Prior to this lesson, students should have at least been introduced to cells, including the basic differences between plant and animal cells. This site provides several links that help to describe and illustrate many aspects that are necessary to build the model. When the students are finished they should understand the basic functions of the structures in the cells. Also, they should be aware of how models are useful and the limitations that exist when using them. (author/kct)