1. MAKE ARROW STRIPS
Students will create a Mono Lake food web by placing organism cards in a logical array and connecting them with arrows to indicate what eats what. Students can draw the arrows on paper and cut the long strips out with scissors.
As an alternative, you might prepare strips ahead of time using a paper cutter. Students then pick up strips from the materials station and draw arrows on them. Each pair of students will need about a dozen arrows.
NOTE: Recycled paper is fine for making arrow strips as long as one side of the paper is clean. Arrows will be recycled at the end of the activity.
2. PLAN FOR MULTIMEDIA
The interactive Mono Lake food web on the CD-ROM is most effective for students if they can work as individuals or pairs at a computer for an extended period of time. If you have access to a computer lab, plan to spend one period working with the multimedia program.
3. PLAN ASSESSMENT: RESPONSE SHEET
At the end of this part have students complete Response Sheet: Mono Lake in their lab notebooks. Collect the response sheets at the end of the period. Use the answer sheet and the scoring guide in the Assessment chapter to score student responses.
4. PLAN ASSESSMENT: MID-SUMMATIVE EXAM
Make copies of Mid-summative Exam 3–4. Give it when you have finished this investigation and feel that students have a good understanding of the concepts in it. They should need 10–15 minutes to complete the exam. See the scoring guide in the Assessment chapter.