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

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[quote=Anonymous][quote=Anonymous][quote=Anonymous][quote=Anonymous]

If your math skills were that strong, you would have no trouble understanding the value of learning these strategies, especially for kids who don't immediately comprehend it. 
Also, the "shortest, most elegant solution" is an appropriate approach once you understand the fundamentals (which is not the same thing as memorizing a bunch of facts and equations. The point of math right now isn't to get to the answer to 3+4 as quickly as possible, it's to understand why 3+4=7, and to understand multiple ways of thinking about the solution so that, when you get more advanced, you're more capable of arriving at the "shortest, most elegant solution."[/quote]

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.  It's looks like a Common Core invention and it's full of crap like this.[/quote]

Singapore Math uses doubles and counting on.

https://www.singaporemath.com/v/sf_pmcctg1a.pdf[/quote]

Absolutely not! They use counting on at the beginning of first grade. Did you read what you posted? I just cut and pasted from the teacher's guide that you linked.  There is no doubles, doubles plus one. The goal is to quickly and accurately know math facts to/from 10 so you can use those to make 10's to solve problems above 10.

Students will probably be able to count on 1, 2, or 3 quickly without using fingers. Fingers can be used if needed to begin with. Note that counting on as a strategy is used only for
adding 1, 2, or 3 in this curriculum. The goal is quick computation, and with adding on greater numbers, it becomes harder to keep track of how many are added on and to know where to
stop without fingers or number lines.[b] Also, adding numbers where the sum is greater than 10 will be taught in the context of the base-10 concept.[/b]

So 6 +7 is never taught as a double plus one. It is taught as 7+3 = 10 6-3 +3 so 10 +3 =13![/quote]

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