techniques, students were guided through a discussion of the growth
and physiology of trees:
Step I: Check
What do you already know about trees?
What do all trees need?
What have you observed about the seasons in relationship to tree
Step 2: Observe:
kind of questions do you have regarding your tree cookies?
Step 3: Generate
questions for investigations of tree physiology and growth:
What are the different colors in cross-sections?
Which color ring was created in what season?
Step 4: Formulate
and justify explanations
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