# Surf for More Math

## Lesson 1- Identifying Factors, Primes, and Composites

** **To encourage your child to
have fun on the Web while learning about Identifying Factors, Primes,
and Composites, here are some games and interactive activities they
can do on their own or in pairs.

**Goal**

Identify the factors of prime and composite numbers.

**Builds Upon**

Student Book pages 166-168

### Instructions for Use

Factor
Tree prompts your child to identify factors.

To use Factor Tree, type in a factor and press 'Enter'. Have your child
continue to input factors in the text boxes as they build the factor
tree. To create two factor trees, click the radio button 'Two' at the
bottom of the screen. Click in any of the four boxes, working with either
the blue or the yellow number. When your child types in a divisor of
the given number, press 'Enter'. When numbers that are not divisors
of the given number are entered, nothing happens. Your child has to
correctly identify a factor. Then the other divisor of the number is
displayed. When your child enters a non-prime divisor of the number,
two new divisor boxes appear to enter further divisors of the given
number. When your child enters a prime divisor, the prime shows in a
circle the end of that branch. Continue until your child reach primes
on every branch of both the yellow and blue trees.

Factors
and Multiples prompts your child to take a number apart, and express
a number as the product of its factors.

To use Factors and Multiples, input the missing number for each prime
factorization in the text box. Click the 'Check Your Answer" button.
Click the 'New Problem" button for the next question. A running total
of your score is shown.

Primes
and Composites lets your child identify prime and composite numbers.

To use Primes and Composites, have your child read the web site.

Practice
Primes and Composites prompts your child to distinguish between
prime and composite numbers.

To use Primes and Composites have your child answer the interactive
questions.