Reply to No doing well with Common Core, but we'll with Singapore math

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[quote=Anonymous][quote=Anonymous]
I don't see the value of the doubles strategies.  Because you're confusing the kids.  You're giving them 3 different strategies - doubles, count on, tens and ones.

Doubles are useless because a) you can't use them in additions above 10; b) kids already pretty much memorize all the additions within 10; c) they confuse kids who are trained to use tens and ones for adding.

No one uses doubles besides CC.  Singapore math doesn't use doubles, Kumon doesn't use doubles, Critical Thinking doesn't use doubles.

My education in math was in Russia.  Russia had an excellent math education.  We never used doubles.  [b]It's looks like a Common Core invention and it's full of crap like this.[/b][/quote]

Actually doubles aren't even mentioned as a term, in Common Core.   This is what is stated as an objectve for first grade, which is where you'd expect the concept of doubles and doubles plus one to be taught:

http://www.corestandards.org/Math/Content/1/OA/

CCSS.MATH.CONTENT.1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10.

Use strategies such as [b]counting on[/b]; [b]making ten[/b] (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); [b]decomposing a number leading to a ten [/b](e.g., 13 - 4 = 13 - 3 - 1 = 10 - 1 = 9); [b]using the relationship between addition and subtraction[/b] (e.g., knowing that 8 + 4 = 12, one knows 12 - 8 = 4); and creating [b]equivalent but easier[/b] or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).[/quote]

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