Last year sometime the oldest and I did a short unit on multiplication circles. Here are some resources for that unit.
The first thing that I had him do was do the multiplication circle for the 2’s table and 3’s table. This isn’t for a younger child even though those times tables are easy. One has to have the ability to keep up with where you are in the scope of 1 to 100 and to draw lines with a ruler easily. Even my 12-year-old (at the time) was frustrated by this. We then noticed what we saw, and predicted what the next sequence would look like.
Afterwards I showed him this video by Mathologer.
I also found this awesome downloadable program that has a model allowing you to play and manipulate the multiplication circles.
Here is the program.
Here is the model of the multiplication circles.
First download and install the program. Then download the model and open the model.