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.

Students choose learning option and write essay.

Objective: To enhance students' ability to decide on options useful to their experience.

Activity: Choose an option and write an essay on why that option was chosen. Options: Plan how to measure the density of a gas in a step-by-step process. List three real situations where knowing the density of objects would be most useful. Explain how your knowledge of density would be useful. Find objects with the lowest and highest densities possible. What are they? How are those substances used? Are they rare? Where do they come from? Find out about densities and "black holes." Explain what would happen if a spaceship (with you in it) approached a black hole. Redo the elevator problem to find the best combination of liquids (slow, steady ride.) Document how you came to your combination.

Assessment: Quality of essays in terms of materials needed, resources, etc.