Expand on prior knowledge of place value to teach your class how to round whole numbers. This essential skill is explained with the help of a number line before introducing the explicit rules for rounding numbers up and down. Work...

Watch animated slides as RJ explains how to round numbers to the nearest ten and thousand. Viewers then get a chance to try it themselves.

Scholars learn to divide multi-digit numbers using the standard algorithm in the 14th installment in a module of 21 parts. They get plenty of practice with the algorithm by completing a worksheet.

Sometimes dealing with decimals is so much easier than dealing with fractions. The ninth lesson in a 21-part module has the class consider situations when it might be easier to add or subtract fractions by first converting to...

Why do medical examiners always state the contents of a person's stomach? Scholars learn about the importance of macromolecules through a case study of stomach contents. They perform multiple tests to determine a conclusion before they...