This lesson covers the concepts of Prime and Composite Numbers. In this lesson, the student will be introduced to the notion of prime number, which is a whole number that has exactly two factors, eg 1 and itself. It also teaches students about composite numbers, which are whole numbers that have more than two factors. Click on the link "Prime and Composite Numbers" to access this lesson. The next lesson in this unit is "Add Numbers up to Millions" and can be accessed by clicking here. If you want to see the various lessons included in this unit, click here.

This lesson is a part of a comprehensive Grade 4 Math course developed by Winpossible, whose ChalkTalk^TM technology (patent pending) replicates the classroom experience while using engaging animated characters. The course matches the Grade 4 correlations of most states in the US. The basic version of the course, which includes lessons and interactive question answers, is available for free on Curriki and can be accessed here.

You can also enroll your students in a paid version of this course which allows you to track the progress and quiz scores of each student on an individual basis, and gives your students access to several additional features such as an interactive question bank, their personal progress tracker, and end-of-lesson quizzes. In order to buy student licenses in the paid version of this Grade 4 Math course, click here.