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...
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,...
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]
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.