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Ingrid Waldron's picture

Revised Student Handout

After presenting this activity in a professional development session for Philadelphia high school biology teachers in February, 2009, we have prepared this revised version of the Student Handout with multiple revisions to clarify the biology and the instructions and questions for the students. The newly revised Teacher Preparation Notes for this activity include some additional suggestions for discussion and modifications to adapt the activity, depending on your specific learning objectives.

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