This is a great way to have your students practice factoring! All problems have a = 1. Students solve the problem on the first card and then find the answer on the top left of another card. If students solve all problems correctly they will end on the card they started! I usually hang these up around the classroom so students are out of their seats and actively solving the problems. A student handout is provided.
Factor quadratics when a = 1 lesson: https://www.teacherspayteachers.com/Product/Quadratics-factoring-notes-a-1-2402744
Pre-teach factoring (positive): https://www.teacherspayteachers.com/Product/Quadratics-factoring-warm-up-all-positive-2402768
Pre-teach factoring (negative): https://www.teacherspayteachers.com/Product/Quadratics-factoring-warm-up-negatives-2403039