Rudiments, the essential rudiments:
Some great visuals for Rudiments are on the Vic Firth site. You can click on a video to learn each of them:
https://vicfirth.com/blogs/40-essential-rudiments-old/01-single-stroke-roll
A good compliment to your students will the ORDER in which they learn their rudiments to gradually build on each skill. You can find this in my guide on this blog: