Patterns and Relations- Worksheets

http://www.nsa.gov/academia/_files/collected_learning/elementary/patterns/patterns_patterns_every.pdf

In the link above, there are several worksheets that will help students understand patterns.  They cover repeating patterns, increasing patterns and the core in patterns.  These worksheets ask students to draw pictures of patterns and make them describe what a pattern is.  In the grade 2 curriculum guide these are all things that need to be taught, as well as extending patterns and comparing them.