In this chapter, we look beyond the whole numbers at other numbers that are included in school mathematics in grades pre-K to 8, particularly in the upper grades. We first look at the rational numbers ...

If there are nine people in a room and every person shakes hands exactly once with each of the other people, how many handshakes will there be? How can you prove your answer is correct using a model ...

Problem-solving is an essential life skill that involves identifying, analyzing, and resolving challenges effectively. Have you ever found yourself staring at a problem, feeling like you’re trying to ...

Want to learn more? Sign up for a free five-week email mini-course full of research-backed strategies to help students make sense of math. Give Cindy Cliche a math word problem, and she can tell you ...

Working memory is like a mental chalkboard we use to store temporary information while executing other tasks. Scientists worked with more than 200 elementary students to test their working memory, ...