I planned this STEM activity based on the random supplies I had in my classroom (paper plates and straws). By planned I mean I typed into Google "paper plates + straws + stem" at 3PM in my classroom with my purse on my shoulder and one foot out the door. I found this post and loved the idea of a marble maze challenge and knew straws would make perfect "lanes". I borrowed some marbles from my school's STEM coach and we were ready to go the next morning. It turned out to be the best STEM…
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