Every composite number has another form: they can all be written as the product of its prime factors. Finding those prime factors is simply a matter of creating a tree, a factor tree! Learn how to do that with this step-by-step, cartoon animated vi...deo from StudyJams. A short, self-checking quiz is also included with this link.[more]

In this video, Sal Khan demonstrates how to solve for x using a single problem. Mr. Khan uses the Paint Program (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Award in Education. (04:33) There... is a lot of information on the screen--the viewer may want to open the video to 'full screen.'[more]

From mathplayground.com, produced by mathplayground

This five minute video uses animation to help show students how to find prime numbers. It is a good overview, but should be stopped to allow students to answer the questions before they are given.

This is one of three videos a team and I did to try using video to convey prime number ideas to middle school students. This one takes a more traditional approach, with me at a whiteboard explaining what primes are. A goal was to jazz it up, in terms... of sound effects and the like, just enough to get the message across. This video is part of the video collection at NextVista.org (http://nextvista.org), a proud partner of Curriki.[more]

A prime number only has two factors, itself and one. A composite number has at least three factors, and sometimes a lot more. Learn more about prime and composites with this step-by-step, interactive cartoon animation from StudyJams. A short, self...-checking quiz is also included with this link.[more]

This video reviews prime numbers and explains prime fractorization with a factorization tree. Many examples are used to help reinforce the concept. The instructor, in his conversational tone, uses a black screen as a 'chalkboard.' Different colors ...and pictures are used for clarification. (04:09)[more]

A teacher defines prime numbers as numbers with only two factors in this video. Examples are shown on a white board, and the teacher sings a song which will help students remember prime numbers. ( 1:24)

This animated video defines prime numbers and uses counters to show the factors of 2, 3, 5, 7, and 11. The lively video is set to music and repeatedly defines the concept. ( 4:25)

A prime number is a positive whole number with exactly two
factors, which are one and itself. A math teacher shows how to use multiplication tables and factor trees to help determine if a number is a prime number.

This is a lesson to help students understand what prime numbers and
composite numbers by using number tables and other activities. Learn from a math teacher how to use math Jeopardy and other activities as a way to learn prime and composite numbers

Please make your comments on categories positive, and not just negative.

People work hard on educational categories, and we want to encourage them to make more!

Profanity (curse words), sexually suggestive remarks, and other such obviously inappropriate comments
will be deleted immediately, and are grounds for immediate expulsion. Remember, children use this website.

Personal criticism on project forums and in video content is not allowed and will be deleted immediately.
Any violations of this rule could result in expulsion from the project so please, no insults or other negative
personal remarks.

Very harshly-worded criticism of content will also be deleted promptly. Please use your vote to express your
harshest feelings. Repeated violations of this rule can result in expulsion. If you must criticize another
person's hard work, then be nice about it.

People work hard on educational categories, and we want to encourage them to make more!