NGSS standard 2-LS2 is about ecosystems and specifically, 2-LS2-2 asks students to develop a simple model that mimics the function of an animal in dispersing seeds or pollinating plants. Models can be drawing or physical representations. This worksheet can represent a simple model. You can use this to introduce pollination or use it as a stand-alone lesson. At the bottom of the enclosed "teacher notes" page, I suggest another idea where students can role-play pollination with one student being the bee, one being the female flower and one being the male flower.