Factors, Multiples, and Prime Numbers

Factors, Multiples, and Prime Numbers

Course overview

This course helps Grade 4 students organize number thinking around factors, factor pairs, prime and composite numbers, arrays, and multiples. Students learn to classify numbers, use array models to see factor structure, and read divisibility clues as a fast pattern check.

What students will learn

• Tell prime numbers from composite numbers by counting factors.
• Find factor pairs that multiply to the same number.
• Use arrays to see rows and columns as factors.
• Build multiples by counting by equal jumps.
• Use divisibility clues to test number patterns quickly.

Lessons

• Prime and Composite Numbers - Learn how factor counts separate prime numbers from composite numbers.
• Factor Pairs and Arrays - Learn how rows and columns reveal factor pairs in a picture.
• Multiples and Divisibility Clues - Learn how skip counting and quick tests help you notice multiples and divisibility patterns.

Parent guide

Work in short sessions and keep the language concrete. Ask the student to name factors, show a factor pair, describe an array, and explain the pattern before moving to the next example.

Completion

A student finishes this course when they can sort prime and composite numbers, find factor pairs with an array or a list, and explain how multiples and divisibility clues fit a repeating pattern.