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Lesson Plan
Curated OER

Cut - Stretch - Fold

For Teachers 2nd - 4th
Students work on determining the area of a tangram piece without using a formula by working with geoboards, graph paper, and tangram pieces. After completing the activity, they apply their experience to determining a formula for finding...
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Lesson Plan
Curated OER

Introduction to Equivalent Fractions

For Teachers 2nd - 3rd
Explore equivalent fractions! Youngters measure the crown of their head with adding tape labeled with various fractions and fractional parts, and compare strips to notice numerical relationships. They fold adding tape in half and color...
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Lesson Plan
Curated OER

Tangram Puzzles

For Teachers 8th - 12th
Students explore the origin of tangram. In this algebra instructional activity, students form different shapes and figures using tangram. They solve for the area of different shapes without using any geometric formulas, but the idea of...
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Lesson Plan
Curated OER

Tantalizing Tangrams

For Teachers 4th - 5th
Students create puzzles of animals based on the 12-animals cycle of the Lunar Calendar. They use logical or spatial relationship skills. Students comprehend the mathematical term geometry. They research the history, beliefs of the...
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Lesson Plan
Curated OER

Area of Tangram Pieces

For Teachers 3rd - 4th
Mathematicians calculate the area of a tangram piece without using formulas. They use a geometry journal to record activities during this lesson. They make a set of tangrams and use them to compute area. They use what they discover to...
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Lesson Plan
Curated OER

Try A Pizza Theme Week

For Teachers 3rd - 8th
Students explore all the things they could do with a pizza. They become aware of food groups and nutritional needs, make decorated cardboard pizzas, interact with pizza slices and fractions, create stories to go along with their...
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Lesson Plan
Curated OER

Symmetry and Tangrams

For Teachers 6th
Sixth graders build figures out of tangrams. In this symmetry lesson, 6th graders view tangrams and identify the polygons included in them. Students divide into groups, identify their tangram pieces, define the lines of symmetry, and use...
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Lesson Plan
National Council of Teachers of Mathematics

The Math Forum: Polyhedra in the Classroom

For Teachers 9th - 10th
Lesson plans for many student activities which introduce the concept of polyhedra into the classroom. Some activities can be accomplished by hand with paper, pencils, and scissors, but the unit works best if the students can regularly...