Students can use tangram pieces to form given polygons.
Work on a challenge using the number of pieces required. To move a tangram piece, click on the piece and drag it to the desired location. To rotate a piece, drag it by a vertex. To select a tangram piece, click on it. To color a selected piece, click on a colored button on the right. Other features can be accessed from the following buttons:
Is it possible to complete all these tasks? Try these tangram challenges with the virtual tangrams:
Which of these figures can you make using all seven tangram pieces?
Many students will find these tasks very interesting but challenging. Young students are learning about position in space, new vocabulary, and properties of figures all at the same time. The computer tangrams may help them become more aware of the properties of figures and the processes they use in manipulating shapes because they must plan the moves they need to make. Teachers can encourage students to become more deliberate in their planning by having them work with a partner to talk about the actions they need to take. For example, students have to figure out explicitly how to place the tangram pieces in relation to one another in activities such as these, where there are no outlines. The built-in rotation and flip tools are also a good way to help students see the transformation motions.These tangram challenges may be made easier by giving students outlines to use at their desks so they can experiment with fitting the seven tangram pieces into the outlines.
Activities such as Tangram Puzzles and Tangram Challenges can serve as vehicles for assessing students' thinking. In observing and talking with students, teachers might consider questions such as these:How easily do students manipulate the shapes?
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