This website has a lot of great, fun and creative ideas to help students practice place value. My favorite is the ice cream cones. Students get to build ice cream cones but matching the numbers and different ways to write the numbers.
Students will never forget what a pentagon looks like! Great for a decorative Math Classroom. Create pentagons with foam core, paint them shapes, put together into a pentagon. Hang from ceiling of classroom. Remember to reference this artists work!
Working Wall that shows samples of all the work done throughout the unit. Great way to display student progress over a longer period of time. This type of board allows classroom occupants and visitors to appreciate the whole learning process.