You won't have to teach grammar anymore, just let the "Piensapapel" do it for you! They contain examples of a grammar concept, and through questions and instructions, guide the students to discover the grammar concept on their own.
I give these sheets to students the day before we go over the grammar concept. They come to class with the completed sheet, and take a bell-ringer quiz on that grammar concept. Then we go over what they didn't understand and review anything they might need. I allow students to use these as cheat-sheets for all assignments except tests.
The grammar concepts included on these sheets are:
Affirmative and negative informal commands
Days of the week (saying "el lunes" instead of "en lunes*")
Words of necessity (hay que, necesitar, deber, etc)
To see a similar inductive worksheet, please download the "gustar" review piensapapel offered as a free sample.
Review of "gustar"