If we had one more ten, there would be 10 tens. Ten tens make one hundred. She removes the ten bars and puts a hundred square in front of the child. If we had one more hundred we would have 10 hundred. Ten hundred make 1 thousand.
Teacher puts the thousand cube in front of the child.
This exercise should be repeated as long as the child is enjoying the lesson. It should be repeated on subsequent days. The material must be kept available for the child to use on his own.