There are some wonderful resources out there that make a perfect companion this this course, or any of the music courses here at Learn.MusicinOurHomeschool.com. Here are some of my favorites.
(The printables for each lesson are included below the lesson, not here.)
To get specific composer notebooking pages, I recommend these from NotebookingPages.com.
Meet the Composer Flashcards
I love the beautiful composer flashcards (with pictures of the composers) from SQUILT.
(This page contains affiliate links.)