re: (Not Common Core)-- Why are they teaching math this way?

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So you knwo for 100% fact that 5+5=10 wasn't taught before hand? Spiffy.

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No, I was taught it once and then memorized it. I know E=MC2 too... but I don't rewrite the proof every time.

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I was taught the old way, and am an engineer. So you;d think if I was uninformed I'd lean against the new way of teaching stuff.

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My point was you had no idea they still memorize like crazy, but just their starting facts (doubles, 5's, 10's, doubles minus 1 etc...). You attacked memorization as not being effective while ignoring the very first questions asked illustrated the fact memorization is still required.

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I don't think it's memoizing. I'm assuming the kid learns why 5+5=10 the same way he will learn why 5+3=8. You call it memorizing, I call it application.

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Wait, so when the question said 'doubles fact', you don't think that meant 'doubles fact', you think it means ..... You were better off admitting you don't know this stuff. the kids are taught to memorize doubles, 5's, 10's etc... then instead of memorizing everything else, they can use this subset of facts to get to the answer. It is less to memorize, but is still memorization. You might want to understand what you are arguing for before you do such.

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Congrats, the child will get there too.

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Yes they will, just several months behind from where they would have been.

Finally, when you said:

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How will that serve as a good base when your child needs to solve 354x286?

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you weren't actually inferring these current day techniques would be helpful? OK, not sure what you are trying to argue.

Of course since you have no idea what is being taught and how I can understand the confusion.