Tangram House (http://games.ztor.com/tang/) This Chinese puzzle challenges students to create a shape using only 7 tans (shapes) to complete a puzzle. The tans can be rotated, flipped, and dragged into place. Tangram House can be used as a math center on classroom computers, completed individually in the computer lab setting, or used as a whole class activity with an interactive whiteboard. To play as a whole class activity, split students into teams that will take turns at the board forming the tangrams. Students who are not at the board can help their teammate using good directions and clues for the student working on the puzzle. This is a great way for students to practice giving and receiving quality instructions and descriptions.