When students truly understand a concept, they can transfer their thinking to a new scenario. Recently during our 7th grade heredity unit, students have been studying patterns of heredity and were given new scenarios to show their understanding of using Punnett Squares to determine the probability of offspring expressing certain traits passed down from parents to offspring. Although not a formal "Making Thinking Visible" routine, I let students use dry erase markers on the windows as a way to graffiti their school academically. Students work in heterogeneous groups to solve the problems. Engagement and collaboration is high and it provided a great way for me to informally assess a groups understanding.