Daily Writing Tips offers one page of grammar, which just might be the perfect amount to give to your students in any class that assigns writing. As you'll see, the one page is comprehensive, yet not overwhelming. Here's an example:
The language is simple and clear for easy comprehension, and there are examples, though they are limited. Assign your students to come up with more.
Divide students into groups to present the different sections, maybe one section per week. Put together a quiz through Google forms after each presentation to make certain they understand the grammar terms and uses.
Place the link on your website for a quick reference throughout the school year.