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:

Guide to Rudiments: Order Please

A more in depth guide to percussion instruments and even a ton more resources can be found here:

https://seatup.com/blog/history-percussion/

There are more detailed resources further on the Seatup.com website. Worth a visit