This site contains a list of links to a large number of mathematics lesson plans for children. While some are related to other mathematics topics, a vast number of them are specifically aimed toward teaching patterning. My favorite lesson on this site teaches patterns through the use of naturally occurring patterns that children would see daily in their lives. Some of the patterns seem a little advanced, but can be used to teach young children through asking appropriate questions such as how patterns can help solve problems and whether they can be predicited. This site contains a huge listing of lessons for all topics including math.
Available lessons encompass all age levels but focus specifically on younger children.
There are several patterning lessons available, as well as several lessons dealing with symmetry, geometry, and grouping that could be modified for the purpose of teaching patterning. Many of the lessons include a variety of activities as well as ideas for centers. Problem Solving Interdisciplinary Problem Solving This site is helpful to teachers for grades K-12. It includes and introduction explaining the purpose of the site, the purpose of teaching problems solving, the steps used in problem solving, as well as common errors, tips for teaching this skill, and sample problem types. Each sample problem is formatted as a lesson plan and contains specific tips for teaching that particular type of problem.