Lesson Plans & Worksheets Reviewed by Teachers

Search educational resources

Search

Menu

Sign In Try It Free
Discover
Solutions
- Educator Edition Save time lesson planning by exploring our library of educator reviews to over 550,000 open educational resources (OER).
- Learning Explorer An all-in-one learning object repository and curriculum management platform that combines Lesson Planet’s library of educator-reviews to open educational resources with district materials and district-licensed publisher content.
About
Pricing
School Access
- Your school or district can sign up for Lesson Planet — with no cost to teachers
  Learn More
Sign In
Try It Free

Create engaging lessons with

vetted educational resources— videos, interactives, games, lesson ideas, and more!

Start Your 10-Day Free Trial

+

Activity

Science Buddies: Divide and Conquer: Proving Pick's Theorem for Lattice Polygons Activity

Science Buddies

Science Buddies: Divide and Conquer: Proving Pick's Theorem for Lattice Polygons

For Students 4th - 8th

If you like to play Tetris then you might like this project. You'll learn something interesting about the mathematics of complex shapes.

Get Free Access See Review

© 1999-2025 Learning Explorer, Inc.

Teacher Lesson Plans, Worksheets and Resources

Sign up for the Lesson Planet Monthly Newsletter

Open Educational Resources (OER)

Health
Language Arts
Languages
Math
Physical Education

Science
Social Studies
Special Education
Visual and Performing Arts

View All Lesson Plans

Discover Resources

Our Review Process
How it Works
How to Search
Create a Collection

Manage Curriculum

Edit a Collection
Assign to Students
Manage My Resources

Contact Us Site Map Privacy Policy Terms of Use