CK-12 Foundation
Ck 12: Interactive Geometry: 9.4 Connections Between Two and Three Dimensions
Cross-sections are one way that two-dimensional objects are connected to three-dimensional objects.
CK-12 Foundation
Ck 12: Elem Math: Counting Vertices and Sides in Various Shapes
[Free Registration/Login may be required to access all resource tools.] Students practice counting sides and vertices in various two dimensional shapes.
CK-12 Foundation
Ck 12: Elem Math: Determining Whether a Given Shape Can Be Tessellated
[Free Registration/Login may be required to access all resource tools.] Students watch a video to determine if a two dimensional shape can be tessellated and then take a quick assessment to test their skills.
National Council of Teachers of Mathematics
Nctm: Figure This: Visualizing
Is seeing believing? Explore visualizing and spatial reasoning with three dimensional shapes in this challenge from the NCTM Math Challenge for Families collection. Discover why visualization is essential skill in real world situations.
PBS
Pbs Learning Media: Chicken Blast Off Peg + Cat
Use this game resource to help children foster the skills of using 3-D shapes to build a spaceship that is just the right size and shape for its passengers.
National Council of Teachers of Mathematics
Nctm: Figure This: Cut the Cake
A math challenge where geometry, measurement, and problem solving meet. Explore the properties of three dimensional shapes when you discover how six friends can equally divide a nine inch square chocolate cake. A one page activity from...
Other
Coloring 3 D Sides
Students use the colored portion of the 2-D drawings to color the correct face of the 3-D model. This applet consists of 20 problems. [Requires Java.]
Other
Coloring 2 D Sides
Learners use the colored portion of the 3-D object to color the correct side of the 2-D drawing. This applet consists of 20 problems. [Requires Java.]
Other
3 D Object Viewer
Students can use this applet to explore different 3-D objects. Different objects can be chosen, rotated, and viewed from a variety of sides. [Requires Java.]
BBC
Bbc: Bitesize: Maths: 2 D Shapes
Learn about the properties of 2-D shapes: circles, triangles, polygons, and quadrilaterals. Includes information, video, and examples about each, with games and quizzes for reinforcement.
US Department of Education
Helping Your Child Learn Math: Math in the Home
An excellent compilation of activities that engage parents and children in math explorations at home. Detailed lessons covering a wide range of math topics such as fractions, measurements, money, data collection, and math in newspapers....
ClassFlow
Class Flow: Shapes
[Free Registration/Login Required] Use this flipchart to identify and name familiar 2d/3d shapes.
PBS
Pbs Learning Media: Cross Sections of a Cube
This interactive exercise focuses on discovering the relationships between two and three-dimensional shapes.
Texas Instruments
Texas Instruments: Explorer Draw App
Students use this App to draw two-dimensional shapes and representations of three-dimensional cubes. [Requires Adobe Reader.]
Science Struck
Science Struck: A Comprehensive Printable List of Geometry Formulas
Provides a list of area and perimeter formulas for two-dimensional shapes and volume and surface area formulas for three-dimensional solids.
National Council of Teachers of Mathematics
The Math Forum: Defining Geometric Figures
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.
Shodor Education Foundation
Shodor Interactivate: Cross Sections
This lesson utilizes the concepts of cross-sections of three-dimensional figures to demonstrate the derivation of two-dimensional shapes.
ClassFlow
Class Flow: Solids
[Free Registration/Login Required] In this flip chart, students apply geometric sense by using the properties of two-dimensional and three-dimensional shapes to solve mathematical problems involving area and volume.
E-learning for Kids
E Learning for Kids: Math: Group of Pyramids: Polygons and Temperature
Learn about 2D shapes and temperature with King Toot.
Illustrative Mathematics
Illustrative Mathematics: 7.g Cube Ninjas!
In this activity, 7th graders slice three dimensional objects to determine what two dimensional shape is created.
Annenberg Foundation
Annenberg Learner: Shadows
Can you judge an object by its shadow? Use your mental rotation skills to determine if a shadow can be produced by a particular shape.
NumberNut
Number Nut: Identifying Traits
Investigate the relationship between shapes and identifying traits or characteristics. A concise lesson that explores physical, chemical, and observable traits in the shapes around us. Build on this knowledge by playing the Web Colors...
Arizona State University
Arts Work: Communicating Feelings Through Shape & Color
A lesson plan to help students understand the use of symbols and images to express their feelings through their artwork. A great lesson plan to boost students' self esteem. Has a link to a site with examples of Kandinsky's work.
Arizona State University
Arts Work: Communicating Feelings Through Shape & Color
A lesson plan to help students understand the use of symbols and images to express their feelings through their artwork. A great lesson plan to boost students' self esteem. Has a link to a site with examples of Kandinsky's work.