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Pro Teacher
This site is a resource for classroom teachers and substitute teachers. The site has lesson plans, message boards, web sites and academic content standards that will enhance your classroom.
PBS
Pbs Learning Media: Harry the Substitute Teacher
Harry and his students look at various arrangements of classroom desks in this video from Cyberchase.
Association for Supervision and Curriculum Development (ASCD)
Ascd: The Best Value in Formative Assessment
Ready-made benchmark tests cannot substitute for day-to-day formative assessment conducted by assessment-literate teachers. This article helps educators find out what assessment for learning is and how it leads to student improvement.