These are untested draft curriculum ideas
My students drafted a set of lesson plans for 2nd grade standards related to pollination, which you can view here.
They also drafted a set of lesson plans for 4th grade standards related to herbivory; these are separated into several files:
Lesson 1: Observing damage
Lesson 2: Measuring damage (with a worksheet)
Lesson 6: Protective structures (with a worksheet)