Curated OER
Tetrahedron Kites
Let's go fly a kite! Discuss the concept of two-dimensional and three-dimensional objects with your math class. They examine a triangle and discuss the face, vertices, edges, and angles. Then they build their own Tetrahedral Kites and...
Arizona State University
Roundup Shapes
Let's study 2-D shapes! Young mathematicians compare and classify shapes according to attributes. They evaluate shape riddles and predict the shape being described. Here is the website where you can find the...
Curated OER
"Investigating Soil Color and Texture"
Ninth graders will identify/understand the differences between soil and dirt. They will classify soil color accurately and use Munsell notation to describe it (Munsell books provided).Students will classify soil texture using the feel...
Curated OER
Pythagorean Theorem
Pupils explore how the Pythagorean Theorem works and how to apply it.
Curated OER
Introduction to Classification
Fourth graders design a classification system to categorize animate and inanimate objects. They discuss the advantages of grouping things as they classify buttons, leaves, shells.
Curated OER
Pythagorean Relationships
Oh that Pythagorean Theorem is so useful. Learners engage in a 45 minute learning activity that requires them to solve for missing angles and sides of a right triangle. They'll use the Pythagorean Theorem to find the rations of sides and...
Pennsylvania Department of Education
A Geometric Scavenger Hunt
Fifth graders connect their knowledge of polygons and polyhedrons. In this geometric shapes lesson, 5th graders identify and classify two- and three-dimensional objects. Students construct a polyhedron out of polygons and describe their...
Curated OER
3-D Attributes
Learners explore geometric solids. In this geometry activity, students listen to the book The Greedy Triangle by Marilyn Burns, then work in groups to sort geometric solids into various categories. Learners define geometric solids...
Curated OER
Quandaries, Quagmires, and Quadrilaterals
Students classify, flip, slide, and turn a quantity of quadrilaterals.
Curated OER
Physical Properties of Matter
Students examine the physical properties of matter. They identify and classify a variety of objects based on their physical properties.
Curated OER
Quadrilateral Attributes
Students classify quadrilaterals. In this quadrilateral lesson, students identify the characteristics of quadrilaterals. They write their findings in a journal. Students use geoboards to create quadrilaterals from given descriptions.
Curated OER
Archeologist Frieze Patterns
Learners construct frieze patterns using translations and rotations. They will discuss how frieze patterns are similar to jigsaw puzzles and use Cabri Jr. to build a triangle frieze pattern using rotations, translations, and reflections.
Curated OER
The Truth About Triangles and Squares
Fourth graders investigate the patterns associated with both triangular and square numbers. They use counters as manipulatives to depict the numbers as needed but focus on problem solving using mental math techniques.
Curated OER
CSI Investigation of Congruence and Similarity
Students differentiate between similarity and congruence using polygons. In this geometry lesson, students label triangles based on their properties. They find missing sides and angles using the interior sum theorem.
Curated OER
Shapes
Students identify attributes of different geometric shapes. For this geometry lesson, students view a PowerPoint presentation on shapes and use attribute blocks to examine the corners and edges of each shape. Students work together to...
Curated OER
Bodacious Buttons
First graders participate in games, graphing, and probability exercises to sort and graph buttons. They sort buttons with Venn diagrams and Bull's Eye graphs.
Curated OER
Shape Makers
Classify and explore shapes by giving learners opportunities to handle, describe and classify 2D and 3D shapes. Primary learners will sort objects such as triangles, squares, oblongs, circles, ovals, pentagons, hexagons, diamonds, boxes,...
Curated OER
Animal Classifications
Third graders work in small groups to investigate how to sort a variety of items into groups and subgroups. They work on a class chart based on the activity which show how the items are classified based on commonalities. Upon completion...
Curated OER
Squares to Compare
Students investigate how to draw and classify two and three dimensional figures (squares, triangles, rectangles.)
Curated OER
Primary Geometry
Students identity simple geometric shapes. In this early geometry lesson plan, the teacher introduces students to triangles, squares, and rectangles, then students identify and classify the shapes as they are found in the classroom. To...
Curated OER
Geometry and Measurement
Middle schoolers view a right triangle displayed by the teacher. Students measure legs and the interior angles of the triangle. They look for a pattern or relationship between the legs and angles. Middle schoolers use pegboards and...
Curated OER
Geo Jammin' - Day 2, Lesson 4: Sing a Song of Shapes
Students learn five songs to define and develop understanding of the attributes of two- and three-dimensional figures and the meaning of mathematical terms. They classify objects as either two- or three-dimensional, through the use of...
Curated OER
New Kids on the Block
Second graders identify and describe in their own language, the following 2-dimensional and 3-dimensional shapes: triangle, square, oblong (non-square rectangle), circle, oval, pentagon, hexagon, diamond, box, cylinder, and sphere. They...
Curated OER
Numbers as Descriptors
Learners use numbers as descriptors. In this mathematical inquiry instructional activity, students use numbers to describe, classify, and compare plants. Learners are made aware that numbers can be used to describe things in the world...