Reply to math curriculum 2.0 -- explaining math strategies

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[quote=Anonymous]Here's a standard from the Third Grade Common Core that requires "explanation"

[quote]CCSS.Math.Content.3.OA.D.9

Identify arithmetic patterns (including patterns in the addition table or multiplication table), [b]and explain them[/b] using properties of operations. 
For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends.
[/quote]

There is nothing in this standard that requires a student  explain her thinking in complete sentences, or using words.   She could use numbers.   For example:

(words)
6x5 will be an even number because it is the same as two equal groups of 3x5

pictures:

6x5 = (3x5) + (3x5)   (Child would use a circle instead of a parenthesis)

I will say that my third grade child would not currently be able to answer a question like this.   I agree it is reasonable to ask most third grade children this question, but the way she is currently being taught, she does not understand that "even" means "composed of two equal addends".[/quote]

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