Unfortunately when you pick from various free Montessori albums online not so good things can happen. Let's just say introducing Divisibility Rules would of helped her a lot before the Long Division Rack and Tubes. I am just sharing our experience here following this child.
First let me share something I HAVE FALLEN IN LOVE WITH THE GOLDEN BEAD MATERIAL!!
After the rule was discovered Ken asked me if I had any more numbers that she could divide. Oh Yes! Let's find the divisibility rule for 3, 4, 5, 6, 7, 8, 9, etc. Ken actually giggled with excitement and was ready to Rock n' Roll. Ken worked on finding the rules of divisibility for the entire work period.
When I was able to reflect on this successful lesson I remembered that Ken responded similarly when she used the Golden Bead Materials to find percentages. This may very well be her favorite material too.