To prepare for this lab you will need seed samples from 10-15 plants. If you have a nature area available, allow students to collect their own seed samples. Challenge students to create their own dichotomous key to help them identify each seed. Students can trade their keys with classmates to assess their seed key and get feedback. If your students are not familiar with dichotomous keys, try the Silly Science Lab (PDF) I have prepared.
Nature Center Lessons and Activities at The Science Spot