Skip to main content
Preview the Course
Grade 3-5

Prime Numbers and Composite Numbers

by Yan L. | Math FREE

2 Lessons 32:49
  1. 1. What are Prime and Composite Numbers? 18:46
  2. 2. How To Tell If A Number Is Prime or Composite 14:03

Grade 3-5


NGSS Standards



About the course

Prime and composite numbers are words we hear in school, but what do they really mean? What is the difference between prime numbers and composite numbers? How can we tell if a number is prime or composite? This course will answer all these questions and more!


  • Composite
  • Factors
  • Multiples
  • Numbers
  • Prime
  • Whole Numbers


Hello! My name is Yan Li and I am a teacher. I have taught as a student teacher in Boston for 4 years and I tutor in China over the summers. I am from Guangzhou, China and New York City. I am currently in my last year of studying elementary education at Boston College Lynch School of Education and Human Development. I am also enrolled in the Master's program for Curriculum and Instruction at Boston College, which I will complete in the upcoming year. My favorite part of teaching is getting to know students and creating course materials that engage students to make learning fun and accessible. I believe that each student is fully capable of understanding material. It just depends on how the material is presented to them. My goal is to meet each student where they are at and support them.

See full profile

Great News! Yan wants to help you unlock your potential.
Virtual tutoring is available now within a few clicks.