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Chelmsford High School junior Reya Kannan shows how she has been coding her new app, Yard2Yum, which won her the Congressional App Challenge in Massachusetts's Third Congressional District.

Chelmsford High junior wins Congressional App Challenge

Jan 23, 2026

Chelmsford High boys swimming and diving coach Craig Vitale celebrates his 100th career win with his team.

The Sun: Swimming coach Craig Vitale reaches milestone at Chelmsford High

Jan 20, 2026

Finn Ramseyer, left, and Matthew Hall led Chelmsford High to a state baseball title last June.

The Sun: Ex-Chelmsford High teammates to reunite with Lowell Spinners

Jan 6, 2026

The Chelmsford High School Students of the Month for December 2025 are, clockwise from top left, Anne Magny, Jackson Chludzinski, Erin Mammola, Lucy Frankland, Jade Boyer and Akshat Pandey.

Chelmsford High announces Students of the Month for December

Jan 5, 2026

The Lions Roar December 19, 2025

The Lion’s Roar: Dec. 19, 2025

Dec 19, 2025

Chelmsford High School National English Honor Society members Ellen Griswold and Maeve Chalmers read to students in Mrs. Bullock's first grade class at South Row Elementary School.

PHOTOS: Chelmsford High NEHS Members Read to South Row Students

Dec 18, 2025

Chelmsford High School Winter Concert 2025

WATCH: Chelmsford High School Winter Concert 2025

Dec 17, 2025

Members of Chelmsford High School's National Honor Society pose among the many donated items to be raffled off during the group's inaugural Festival of Trees.

Chelmsford High NHS holds Festival of Trees

Dec 16, 2025