Regrouping is a fundamental mathematics practice. Deep, early understanding of what's happening during regrouping will serve a student well in both math class and in daily life. But how do you...

# Tag: 4thgrade

The number 72 is frequently used to demonstrate deep mathematical structure. Not only does it have factors other than 1 and itself (it is composite, or not prime), it has quite a lot of them, and its...

The area model is one way of organizing our place-value calculations while completing a multi-step multiplication problem. Just like any other multiplication "method" or "algorithm," the area model...

I'm seeing multiplication tables like this in more and more schools. Each product is made up of the number of squares it represents. When would you use an area model? What does it represent? An...

Students are taught multiple models in mathematics. This gives them multiple opportunities to understand an idea, strengthens and deepens connections to the material, and provides multiple tools for...

Add, Subtract, Multiply, Divide in Word Problems? Beyond Key Words

Word problems are the bane of math students' existence. Children and adults alike often struggle to set up and solve problems phrased as a math word problem, even if they could easily solve the exact...