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4th-5th Grade Math Learning Activity: Prime Numbers

In this math activity, follow this student as he discovers a way to find out if numbers are prime. He used stamps to explore different ways of arranging items in rows, which helped him find a number’s factors. How do you find out whether or not a number is prime?

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This interactive activity is embedded in our Math course.


This research-based course focuses on computational fluency, conceptual understanding, and problem-solving. The engaging course features new graphics, learning tools, and games; adaptive activities that help struggling students master concepts and skills before moving on; and more support for Learning Coaches to guide their students to success. This course for students in Grade 4 moves into applications and properties of operations. Students work with simple fraction and decimal operations, which are applied in the study of measurement, probability, and data, and mathematical reasoning techniques. Students begin the study of equivalencies between fractions and decimals on the number line and early work with integers. Algebraic thinking is developed as students work with variables, coordinate graphing, and formulas in problems involving perimeter, area, and rate. Geometry is extended into greater classification of shapes and work with lines, angles and rotations.

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