Here are five pieces of digital content a teacher might choose from StarrMatica’s library to support and enhance the teaching of: CCSS.MATH.CONTENT.4.G.A.3 *Recognize a line of symmetry for a two-dimensional figure as a line across the figure such that the figure can be folded along the line into matching parts. Identify line-symmetric figures and draw lines of symmetry.*

Students learn about line symmetry with an animated tutorial.

Students see lines of symmetry drawn on shapes.

Students use a grid to create a symmetrical drawing or can create half of a drawing and swap with a partner to complete each others.

Choose one of eight faces and explore what happens to its image in the Symmetrizer.

Students complete a symmetrical pattern on this virtual grid, or create a pattern of their own for someone else to complete.

]]>With this interactive, students can explore the forces that create a hurricane:

http://oceanservice.noaa.gov/education/pd/oceans_weather_climate/media/create_hurricane.swf

Show students the meaning of each number on the Richter scale:

http://www.iknowthat.com/ScienceIllustrations/earthquake/earthquake_movie.swf

Watch plants grow and move through time lapse photography.

http://www.cjhs.org/teacherssites/taylor/accbio/PLANTS/TROPISM-MOVIE/TROPISM%20%20MOVIE.swf

Create a habitat best suited to the needs of each animal:

http://switchzoo.com/games/habitat.swf

Find, identify, and see how simple and compound machines function:

http://www.edheads.org/activities/simple-machines/frame_loader.htm

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