I just had a question about the worksheet in this lesson. It asks the child to add 1, 10 and 100 to each number. Dd did not have a problem til maybe the middle of the 10's column. Was it okay for me to let her use the side 2 of the abacus? She didnt need it for every number in the 10's and 100's columns but just some. Thanks!

Forget it. I just read the next 2 lessons, which i should've done BEFORE having her finish the worksheet. We did take a few days on it but i just didnt want to move on until it was done so i didnt bother reading the next lesson. Sorry.

I had my son work on the problems after lesson 50 and it was too much for him. Then we moved on to 51 and I realized that the worksheet is completed over several lessons. Maybe this should be noted in the TM at the beginning of lesson 50.