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The Common Core State Standards (CCSS) include eight “Mathematical Practices” that teachers and students are encouraged to use throughout their mathematical lives. These are different from the...

The Common Core State Standards (CCSS) include eight “Mathematical Practices” that teachers and students are encouraged to use throughout their mathematical lives. These are different from the...

The next-to-last step of any problem solving should be checking your answer for reasonableness. (The last step, of course, is stating the answer clearly and completely.) Often when we're working...

You may have a vague memory and understanding that numbers come in two forms: prime numbers and composite numbers. (Or at least prime and not prime.) Both of these terms have to do with a number's...

Shortly after we start multiplying, we're taught to factor numbers. So often it feels like a pointless rite of passage that we're forced to endure. We learn it devoid of all the contexts it will be...

Few things will help a student keep up in math better than fluently and confidently knowing their multiplication tables. Teachers all over see this slowing students down in math class and undermining...