of this marathon I'm running! 7th grade's activity was too long, 8th grade's too short. Luckily there are so many amazing sites out there to share. Have you ever watched TED ED? The ED makes it relevant to classrooms. Today as we reviewed cell concepts that the 8th graders learned in 6th grade, I played the Wacky History of Cell Theory. It's animated and interesting and an extra that I've planned every day just in case I need it!!