Good teachers know that the physical environment of the classroom can either enhance or hinder learning. Appropriate room preparation and arrangement of materials reserves class time for learning, while inadequate planning interferes with instruction by causing interruptions and delays. Before the year begins, effective classroom managers carefully consider how they want their classroom to function and the way they want their students to behave. Good teachers also know that a positive classroom climate supports student learning. This brochure offers keys to good classroom design, tips for implementing classroom procedures and rules, and ideas for reinforcing teachers expectations.