I don’t use Ruth Beechick’s book, although I do have it and have read it. I use it only for scope and sequence when writing out my IHIP. And maybe for a game idea for once in a blue moon.
We brought out the abacus and the clock at age 6. My dd hasn’t been able to begin to understand time till these past 6 mths; she’s 9. My son, the clock use was fine at 6.
Thinking back, before I knew of Math Mammoth, for my son, I used the Kumon My Book of Easy Telling Time, then Kumon My Book of Telling Time. Then for money, Kumon My First Book of Money Counting Coins and then Kumon My Book of Money Dollars and Cents. He went through them quickly, picked up on the time with no problem and it laid a good foundation for future money understanding, but the money ones could’ve waited till a little later, but no harm done.
My dd went through the first telling time book but stalled out on the second; she was just not getting it. She has sensory issues that include sequencing problems, so time has been an ongoing area of consistant teaching; that’s how I came across Math Mammoth Blue Series, which is what he uses for measuring (#1) and she is continuing her learning of time. Both resources are colorful and good, MM may be more thorough and in depth, and much less expensive, plus, you can download and print out and use for older ages; it’s just a matter of whether they are ready for the material. My son was at 6 and 7 (when he did the Kumon), my dd wasn’t at 6/7, only at 9 now. I’ll continue w/MM for money for her and and measuring for them both.
However, back to your original question, the abacus has been used since age 6 by both in their math; I wanted to discourage the habit of finger counting. I am pleased with starting the abacus at that age and they still use it when needed, esp. her.