I've mentioned how Idaho math teachers are moving in the right direction thanks to a math initiative from our state. From my viewpoint, we're learning about giving kids better tasks that press their conceptual thinking - tasks that can be solved in various student-centered ways.
Recently I attended a composing and decomposing workshop and took away a great task. It presses their thinking and allows for various modes of solving the problem.
I fancied it up and liked it enough that I made a few more.
You're welcome to them if you'd like. Simply click on the pictures to get your own copies.