Welcome to Dedham School The Dedham School enjoys a fine reputation for educating students in a caring, supportive manner. School climate is something of which we are very proud. We have talented staff and a wide range of educational programming. With a student population of 174 students Pre-K-8, class sizes are small. We try to provide individual attention for all our students. We have approximately 100 high school students at various area high schools. Please click here to visit our website.