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Lesson Planet Article
Curated OER

Area and Perimeter Activities

For Teachers 3rd - 5th Standards
Read this article before you begin teaching geometry! It gives teachers some insight into the world of teaching geometry to young learners, and four area and perimeter lessons are attached. 
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Lesson Plan
Curated OER

Area of Circles and Probability

For Teachers 8th - 12th
Students investigate the area of squares and circles. For this geometry lesson, students calculate the area and probability of simple events. They work on a laptop using Safari.