I dunno. I never heard of the "common core" multiplication algorithm and my 3rd grader kid only knows "regular" multiplication. He grasped it from the first few

I dunno. I never heard of the "common core" multiplication algorithm and my 3rd grader kid only knows "regular" multiplication. He grasped it from the first few examples and had no problems with it. "Common core" seems more unnecessary complication than the regular algo which works on arbitrary numbers: 7593 x 267: everything done in one go compared to tons of workarounds and additions. Again, my kiddo does these without blinking and I see no reason to teach him differently.