Alyssa Diaz, 5th Grade Teacher on Instagram: "Happy National STEM Day! My students had an absolute BLAST building their pinball machines. The prep was so quick and easy, and they were entertained, problem solving, engineering, and collaborating for an hour and a half. They had so much fun that we are extending the activity over to next week! This specific activity can be used with grades 4-6, and there are so many different ways you can bring different elements of math into it. The students were