There's a great set of factoring quadratics task cards available to help students practice factoring on their own. You can print the cards with or without QR codes (students can quickly scan the QR codes to check their answers!).
There's another printable activity available to accompany this lesson: factoring quadratics speed dating. Never tried speed dating in your classroom? It can also be called Quiz Quiz Trade. The idea is for students to quickly "date" as many other students as possible. Students form pairs and answer questions on small printed cards. They check the answers on the back, trade cards and quickly find a new partner to repeat the process.