Give guidance and feedback to students' plans, encouraging, refining, and helping them to be responsible for their own learning. Maintain high expectations for completion of chosen options. Summarize by reviewing the whole, bringing students "full circle" to the experience with which the learning began.

Evaluate by having students make a key for leaves & a key for fish.

Objective: To have the students confirm their understanding of classification keys by constructing their own keys for leaves or fish or some other small sampling of living things.

Activity: Now that they have used and studied keys, the students are given a set of pictures of fish or leaves, something different than what they have already used and asked to construct their own dichotomous key. They then swap the key with a partner to ensure that it is true to the form and that it works.

Assessment: Students' ability to successfully construct and use a dichotomous classification key.