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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

Geometry: Lesson 1: Points, Lines, Segments, Angles

For Teachers 4th
Fourth graders examine the concepts of, draw, and label points, lines, segments, and angles, They draw, label, and identify horizontal, vertical, intersecting, parallel, and perpendicular lines. They complete an associated worksheet that...
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Lesson Plan
Curated OER

Exploring Polygons and The Greedy Triangle

For Teachers 1st - 3rd
Excellent lesson plan! Anne Linehane's geometry story, The Greedy Triangle, offers an opportunity to practice forming various types of polygons with your learners. Using elastic bands (or Chinese jump ropes),...
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Lesson Plan
Curated OER

Geometry Fun

For Teachers 3rd - 5th
Students learn the basic definitions of a quadrilateral, parallelogram, rectangle and square and explain the relationship/classification process between them.
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Lesson Plan
Curated OER

Edible Geometry

For Teachers 6th - 8th
Learners examine a chart that lists the main characteristics of polygons and 3 dimensional figures. They make examples of the polygons and figures using pretzels and gum drops showing how the gum drops are vertices and the pretzels are...
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Lesson Plan
Curated OER

SuperShapes, Part 1; "Tri"ing Triangles

For Teachers 5th - 6th
An outstanding lesson on triangles awaits your math scholars. Learners focus on the triangle, which is the strongest of all polygons. They see the role that triangles play in the design of buildings, and learn about triangle...
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Lesson Plan
Curated OER

Geometry Challenge

For Teachers 5th - 7th
Students explore angle relationships and measure angles with a protractor by hand and online. They explore various websites and complete online activities and complete a worksheet.
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Lesson Planet Article
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Curated OER

How to Implement Project Based Learning to Engage Students

For Teachers 3rd - 12th
Can a math teacher employ project-based learning? Learn how one great math teacher uses PBL to design math projects that provide learners with a more challenging and holistic learning experience. A wonderful article, that includes...
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Lesson Plan
Curated OER

Kindergarten: Geometry in Our World (Centers)

For Teachers K
Students identify attributes in real-life objects and models of solids and connect these attributes to characteristics of shapes such as circles, triangles, squares, and other rectangles. They discuss the ability of the object to roll,...
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Lesson Plan
Curated OER

Discovering Pi/Welcome to Pi Day

For Teachers 9th - 12th
High schoolers explore pi. In this circle measurement lesson, students define and identify radius, diameter, circumference, and perimeter. High schoolers work in groups to measure several plastic lids and record their findings. Students...
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Lesson Plan
Curated OER

Problem Solving/ Holistic Lesson Plan: Paper Structure

For Teachers 6th - 12th
Learners observe geometric relationships in buildings and structures. They reason why structures are constructed in a specific way by applying geometric concepts. They construct a shelter using their geometric knowledge.
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Lesson Plan
Curated OER

Tangram Geometry

For Teachers 1st - 5th
Students listen to a story involving Tangram pieces. Students use Tangram pieces to complete shapes using an outline of a design.
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Worksheet
Curated OER

Classifying Triangles Using Sides

For Students 4th - 5th
In this geometry worksheet, students answer 8 fill in the blank questions where they must examine 5 different complex geometric figures to classify triangles.
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Lesson Plan
Curated OER

Secret Writing Devices

For Teachers 3rd - 8th
Elementary and middle schoolers explore the world of secret writing, otherwise known as cryptography. After an interesting introduction to the activity, learners utilize a decoder badge which uses the St. Cyr cipher - which is a cipher...
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Lesson Plan
Curated OER

Geometry: Tessellations

For Teachers 2nd - 3rd
Learners create tessellations with computer software while applying their knowledge of reflections, rotations, and translations.
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Lesson Plan
Curated OER

Lesson 9-3 Practice B: Composite Figures

For Teachers 9th - 12th
In this composite figures worksheet, students solve 11 short answer problems. Students find the area of figures composed of various polygons. Students find the area of each figure given a sketch of the figure with various measurements...
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Worksheet
Curated OER

Challenge: Skills and Applications Lesson 1.3

For Students 10th - 12th
In this skills instructional activity, learners explain the Segment Addition Postulate, provide examples and counter examples and determine congruent line segments.  This one-page instructional activity contains 11 multi-step problems.
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Worksheet
Curated OER

Challenge: Skills and Applications Lesson 2.2

For Students 9th - 12th
In this truth tables learning exercise, students solve 5 short answer problems. Students make a truth table for five conditional statements.
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Worksheet
Curated OER

Challenge: Skills and Applications Lesson 3.3

For Students 9th - 12th
In this angle measures instructional activity, students solve 9 short answer problems. Students find values for x and y given two parallel lines cut by a transversal. Students use alternate interior, supplementary, and exterior angles to...
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Lesson Plan
Curated OER

Points, Lines, Planes, and Space

For Teachers 9th - 12th
In this points, lines, planes, and space worksheet, students solve word problems dealing with points, lines, planes, and space. Students complete 20 individual problems and 20 group problems.
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Lesson Plan
Curated OER

The Flat Earth

For Teachers 9th - 11th
Young scholars differentiate between different planes. In this geometry lesson, students differentiate between a plane and a sphere. They discuss the Great Circle, Geodesic and Lune as it relates to the earth.
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Lesson Plan
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Illustrative Mathematics

Shortest Line Segment from a Point P to a Line L

For Teachers 9th - 11th Standards
One of the hardest skills for many young geometers to grasp is to move beyond just declaring obvious things true, and really returning to fundamental principles for proof. This brief exercise stretches those proving muscles as the...
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Lesson Plan
Curated OER

Identifying and Describing Polygons

For Teachers 8th - 10th
Pupils identify the different properties of polygons. In this geometry lesson, students differentiate between polygons and non-polygons. They review important vocabulary to help them understand the properties of polygons.
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Lesson Plan
Curated OER

Varieties of Quadrilaterals

For Teachers 4th - 7th
Students classify quadrilaterals, In this quadrilaterals lesson, students watch a video about parallelograms, discuss the different types of quadrilaterals, and complete a worksheet classifying quadrilaterals.

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