Factoring by grouping. Notes included.
***I do NOT teach the "guess and check" method of factoring. I do not find students to be successful with this method, and thus teach the "AC Method" to factor a trinomial - it is a simple process that students catch on to quickly. You must fully develop the concept of factory by grouping in order to use this method, hence why this is lesson 3.
I find this to be a "natural" place to do factoring by grouping, anyway, since it follows directly on the concept of GCFs.