Excellent double sided worksheet for teaching factoring of trinomials, when "a" is greater than one. It starts off by having students write a quadratic functions given roots. Then, reviews the day before by having them factor trinomials when "a" is 1. The rest of the worksheet is when "a" is greater than 1. Excellent worksheet, and usually takes students 45-50 minutes to complete. There's plenty of space for them to do/show their work.