🧬 Help your students master one of the most important foundations of biology with this no-prep Cell Theory reading passage and quiz — perfect for 6th, 7th, 8th, 9th, and 10th grade life science and biology! This resource introduces students to the three main principles of cell theory and the key scientists behind its development — Robert Hooke, Matthias Schleiden, Theodor Schwann, and Rudolf Virchow. What's Included: ✔ Informational reading passage ✔ 3 principles of cell theory explained ✔ Key