This month's group lessons consisted of rehearsing and videoing the duets, (October was duet month) and making homemade scale foldables. I had two to four students at a time, for one hour.
Buying scale books is possible but allowing each child to use the patterns to make their own scale book is child centered-learning. I used colored folders, inexpensively purchased at Amazon, as the shell and the inside varied depending on age. Keyboards can be copied for free from Susan Paradis. (Thank-you, Susan) Scroll down the teaching resources page to Keyboard labels. My students glued the labels on, making dots on the keyboard to illustrate a 5-finger or octave scale, and then with post-it notes made covers for each scale. We will use them at their lessons.
A even more inexpensive version is to fold two pieces of paper hot dog style, vertical, and then staple them into the folder. After the scales are written in we cut the top fold just under each scale and make a cover. The best part of this process, for me, was listening to them discuss half-steps and whole-steps. It was keyboard analysis from which each student benefitted.