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Welcome Back to School!
  • Wednesday, September 2: All students 8:00-2:50
  • Thursday, September 3:     All students 8:00-2:50
  • Friday, September 4:          No School. Building closed.
  • Monday, September 7:       No School. Building closed.

Welcome to William Diamond Middle School’s website. One of two middle schools in Lexington, Diamond offers a rich and interesting program of study in traditional academic subjects, physical education, the arts, and technology. We serve about 780 students, in grades 6, 7 and 8. We are proud to participate in the METCO Program, welcoming students from Boston as well as Lexington into our Diamond community.

This website is designed to give you access to a range of information about Diamond, and about your child’s current and future experiences here. Among other things, you will find information about departments and courses, and links to teacher web pages, as well as information about clubs and activities. We hope that you find it informative and easy to use. Welcome to Diamond! 



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  • SPED Coffee Sept. 17th
    Special Education Parent Coffee will be held in the Library Rotunda on Thursday, Sept. 17th, from 8:10-9:10 am.

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  • Report absences via email!
    New this year: you can report absences via email!  Use the Diamond Absence email address.  Include name, date, and absence reason in the subject line.

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  • Update your emergency contacts online
    Use your Aspen Family Portal to update your child's contact information. Click here for instructions.

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  • Not Returning to Diamond?
    Students not returning to Diamond (or Lexington Public Schools) for the 2015-2016 academic school year must complete an official withdrawal form. If you want your academic records forwarded you need to fill out a record release form.
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  • Report Bullying
    If you or someone you know at Diamond is being bullied or unsafe, report it online by using the form under Quick Links (left side of this page).
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  • Sentricon Info
    Click here to read more about the Sentricon Termite System installed at Diamond. While no termite activity has been noted, and no chemicals are currently being used, Massachusetts law requires us to notify parents about the treatment program in the event that the need arises. 
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