Chess notation

This may be a stupid question, but I don't think so. I'm a retired teacher, and a fairly good chess player. I just play for fun - have never competed, so have never used notation in that setting. I'm going to be teaching the basics of chess to some folks in my retirement home, and need to know how to differentiate between the knight and the king when they move. On chess.com they show the picture; that isn't any help. Using the first letter (R, B, Q) works, but for knight and king, what do you do? Use lower case and Capital letters?

Of course! Thank you. I knew that, but my brain is aging and I forgot.

Xd

Chess Courses - Instructional Resources...

https://www.chess.com/blog/RussBell/beginners-chess-course-instructional-resources

Letters for pieces are capitalized (K,Q,R,B,N). Pawns are indicated simply by the square(s) they reside on, for example e4, a3,..etc... that is, squares are designated by lower case letters, followed by a number; the letter designates the file (a-h), the number designating the rank (1-8)

https://en.wikipedia.org/wiki/Algebraic_notation_(chess)