This NCTM E-Example features a two-part tangram example demonstrating how to address content in the geometry standard by problem solving with hands-on and virtual manipulatives. In the lower grades, describing figures and visualizing what they look like when they are transformed through rotations or flips or are put together or taken apart in different ways are important aspects of geometry. In the first of two related tasks, Tangram Puzzles, the student can choose a picture and use all seven tangram pieces to fill in the outline. In the second task, Tangram Challenges (accessible from this site), students can use tangram pieces to form given polygons. A discussion about student learning and teacher reflection questions are included in the example. (author/sw/js)