Happy Thanksgiving day to all my American readers. Today, I share to you more than 1300 lesson plans and activities in K-12 mathematics. Please do not forget to share to your colleagues.

Affiliate: Math Lesson Plans for Teachers

NCTM Illuminations contains 607 lessons plans and 108 activities ranging from Kindergarten to Grade 12. The lessons are divided into Numbers and Operations, Algebra, Geometry, Measurement, and Data Analysis and Probability. The site also includes interactive applets.

Annenberg Media offers 9 Big topics in mathematics containing 107 lessons. The site also contains videos of teachers and educators using the lessons in their class and sharing about their experiences about the lessons.

Math Forum of Drexel University has a link list of 88 lesson plans. The lessons (links) points to different websites.

NASA contains at least 158 lesson plans and activities in mathematics. Most of the activities as you would have guessed relate physics, astronomy, and mathematics

Lesson Planet contains 100 lesson plans in K-12 mathematics. I have not browse this site much, but the lessons are rated by the teachers, so you will have a good idea which lesson plans to download.

**6. MCRel**

MCrel contains 39 lessons from K-12 mathematics. Most of the lesson plans are for Grades 1-6.

Contains 108 lesson plans divided into number and operations, algebra, Geometry, Measurement and Data and Probability. It is maintained by the Office for Mathematics, Science, and Technology Education, University of Illinois.

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Photo Credit (Creative Commons): ** **www.audio-luci-store.it via Flickr.