I don't spend a lot of time focusing on grammar in levels 1 and 2, but I hand this sheet (1 page front to back on colored paper) to my Spanish students in level 2 once they start using other tenses beyond the present tense. I explain how to use it as a resource especially for written work and they keep a copy of the "Cheat Sheet" in their binders. This is a great tool for your AP students or concurrent enrollment students.
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Check out my FREE Spanish 1 Curriculum Map
I also have a Spanish 2 Curriculum Map