Mrs. Rice and her friends review some basic geometric shapes for third-graders. Some of the shapes reviewed are circle, square, triangle, rectangle, rhombus, trapezoid, quadrilateral, and parallelogram. This is a great resource to help students maste...r this important skill. (04:02)[more]

This video explains the concept of the union of two or more sets. ( The union contains all the elements in all original sets.) A black board containing two sets of letters, shapes, etc., is shown , and a narrator explains combining the sets and exp...lains the union symbol. ( 2:28)[more]

Mrs. Rice and her friend, Ms. Reppert get ready for the Math and Art party by reviewing all their shapes. She sings about objects being congruent, flip, slide, turns, and symmetry. Get ready to sing some geometry songs. This is a great resource to he...lp teach mastery of these important skills. (6:32)[more]

Tim Bedley, veteran teacher, gives a mini lesson to remind students how to find a rectangle and a square. How are they the same? How are they different? Squares are Rectangles with Congruent sides. All squares are rectangles. All rectangles are not s...quares. This is a great resource to introduce and/or to review geometric shapes in the classroom. (2:17)[more]

From teachingchannel.org, produced by The teaching Channel

Lesson Objective: Use properties of similarity and build 3D models and cross-sections. Questions to Consider: How is tracing paper used to increase understanding of similar figures?See how Ms. Whicker uses blocks and drawing to help students visualiz...e three-dimensional objectsHow do students create cross sectional views from 3-D objects?
Support Materials BelowLesson plans and moreCommon Core StandardsMath7.G.3, Math7.G.6, Math 7.RP.2
(5mins)[more]

Identify shapes in different environments (e.g., nature, buildings, classroom, etc.) Identify two-dimensional shapes by attribute (size, shape, number of sides).

Teacher demonstrates regular and irregular geometric shapes at the white board. Understand the types of geometric shapes with tips from a mathematics teacher. Recommends trying to break complex shapes into simple shapes. (2:30)

This 3:39 video shows students how to do this operation using a teacher and white board. It moves rather quickly so the video may have to be paused to enable the students to catch up to the instructions.

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