Interactive
Quia

Ixl Learning: Select Two Dimensional Shapes

For Students K - 1st Standards
This interactive media source asks students to determine which picture shapes are two-dimensional.
Lesson Plan
Alabama Learning Exchange

Alex: Guess My Shape

For Teachers K - 1st Standards
The students will make the connection between 2-D and 3-D shapes using modeling clay and geometric solids and participate in an interactive web lesson. Students will make predictions about what 2-D shape they think will be made when they...
Handout
National Council of Teachers of Mathematics

The Math Forum: Defining Geometric Figures

For Students 5th - 8th Standards
This site provides an in-depth definition of a two-dimensional figure and a three-dimensional figure. Related terms include arcs, vertices, polygon, and many more.
Unit Plan
Math Planet

Math Planet: Pre Algebra: Measure Areas

For Students 4th - 6th Standards
Demonstrates how to calculate the area of two-dimensional shapes using formulas. Covers parallelogram, triangle, trapezoid, and circle. Includes a video modeling how to find the area of a circle and a triangle. [0:59]
Professional Doc
Other

Kindergarten Works: 10 Activities for Describing 3 D Shapes in Kindergarten

For Teachers Pre-K - K Standards
Describing 3D shapes in Pre-K and Kindergarten is now an expectation as it is a key geometry standard. This resource contains 3D shapes activities and resources for practicing this standard. Included are chants, videos, games, poetry,...
Lesson Plan
University of Regina (Canada)

University of Regina: Math Central: Shape Activities

For Teachers Pre-K - 1st Standards
Two and three-dimensional geometric shape are explored in these exercises. Each activity has teacher notes, activity instructions, and a worksheet when necessary.