A recent “Coaches’ Corner” feature of Teaching Children Mathematics encourages the use of bulletin boards as teaching tools. Robyn Silbey shares a cool example for grades K-5 by using a single prompt (What is equal to 10?) divided into columns for all classes to respond. This tool seems appropriate for expanding algebraic instruction and thinking to all elementary grades, so here’s my proposed bulletin board. Teachers could rotate through small group displays so that all kids get “on the wall” in one year.