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Kelly Hudson (khudson@steds.org)
学生说明
1. Click 
to open the template.
2. Setup the experiment.
3. Set the timer for 5 minutes.
4. Put the snails on the line.
5. After 5 minutes, count the snails on each side.
6. Type 
the data.
7. Take a 
of the results.
8. Repeat for trial 2 exactly the same.
9. Repeat for trial 3 exactly the same.
10. Click the green 
to save
教师备注（学生不可见）
Materials Plate 5 Snails per group Construction Paper or Box for dark Flashlight for light Science and Engineering Practices in the NGSS 1. Asking Questions 3. Planning and Carrying Out Investigations 4. Analyzing and Interpreting Data
