As part of our exploration of number theory, we will look at two models for finding least common multiples and greatest common factors: the Venn diagram model and the area model. Later in the session, we will explore prime and composite numbers.

For information on required and/or optional material for this session, see Note 1.

Part A:	Models for Multiples and Factors
Part B:	Looking for Prime Numbers
Homework

In this session, you will do the following:

Understand greatest common factors and least common multiples and how they relate to one another

Understand alternative models and methods for computing greatest common factors and least common multiples

Understand prime and composite numbers

Understand the location of prime numbers within the number system, and use this understanding to determine whether very large numbers are prime

Throughout the session you will be prompted to view short video segments. In addition to these excerpts, you may choose to watch the full-length video of this session.

Previously Introduced:

New in This Session:

counting numbers
factor
factor tree
prime number

composite number
greatest common factor
least common multiple
Venn diagram

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