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 get it. Doubles and doubles + 1 are right there. What did you mean when you said they're not in CC?[/quote]

I said it wasn't mentioned as a term.  As the earlier PP posted,  the "known sum" could be any known sum, not specifically a sum of the number to itself (a "double" fact).

I still think teaching some facts as "doubles" makes sense.   If kids play board games, or dominoes (unlikely nowadays I know) they see doubles a lot (in many games, rolling doubles means you get to roll again, that kind of thing), and memorizing doubles facts basically is preparation for your x2 multiplication facts.    The first type of skip counting a child learns is counting by 2s, usually -- all the even numbers -- so matching those answers to your doubles facts is a pretty easy concept as well.  Trying to move from knowing your doubles, to knowing a fact is a double plus one, might not be quite so simple for some kids.

Anyhow bottom line -- according to Common Core by the end of 1st grade, all facts to 10 should be memorized and fluent.   All facts to 20 should be memorized and fluent by the end of 2nd grade.  So after 2nd grade, kids who are working on grade level shouldn't need to be using ANY of the above listed strategies anymore -- the facts should be mastered by memory.  Common Core doesn't state HOW they should be mastered.  The standard lists possible strategies as examples, but doesn't specify any particular one must be used.   The choice of which strategy to use or whether to use it is a curriculum decision... and a teacher or school decision.[/quote]

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