**Definition of a Prime Number: **A
number that cannot be evenly divided by any other number except 1 or
by itself. Example: 13. The number 13 can only be evenly
divided by 1 or by 13.

**Definition of a Composite Number: **A
number that can be divided evenly by numbers other than 1 or itself.
Example: 25. The number 25 can be evenly divided by 5.

**Free Interactive Prime Number**
**Games for Kids: **King
Kong Prime Numbers, Find a Prime: Games
& Activities for Kids

**Lesson Idea for Teachers:**

**Exploring Prime Numbers**. This
is a hands-on,
minds-on math lesson that engages students in the discovery of prime
numbers through the construction of multiplication arrays.
Students then extend on their background knowledge of multiples and
their new understanding of prime and composite numbers to complete
an Eratosthenes’ Sieve. Lesson
details

**Free Presentations about Prime
Numbers: **

Prime
Numbers Presentations - Several Free
Presentations in PowerPoint format about prime numbers

Free
Presentation - Finding all prime numbers
between 1-100

Math
Index of Presentations

**Free Apps: **

Free
Math iPad Apps for Kids