TOWNSEND — It was a busy day. More than100 seniors arrived by bus at the high school for a choral and instrumental concert in the auditorium, followed by lunch in the cafeteria at the far end of the building.

This is the fourth year the National Honor Society has coordinated the event, said Susan Hamel, the principal’s secretary at North Middlesex Regional High School.

One of the pillars of NHS is community service, she said.

Juniors Anastasia Kowlopoulos from Pepperell and Carmel James from Townsend coordinated the March 28 lunch.

They divided up the duties; planning for months in advance, holding meetings and keeping fellow club members informed of progress through texting and a facebook page.

James called Spaulding School to ask for placemats made by kindergarten students. Kowlopouos called the Bronze Bell to ask for flowers.

They had plenty of assistance for the event. The 33-member society was on hand. “Everyone helps out,” said William Foster, president of the society and a senior from Townsend.

Members set up the tables and brought in baked goods and other supplies, he said.

They served food, helped in the kitchen and escorted and greeted their guests, the coordinators said.

“Each student has to coordinate a community service project each year,” Lyssa Morin said. The 30 year teacher has advised NHS for three years. The senior luncheon is just one of the projects this term.

The NHS will hold a semi-formal April to raise money for Alzheimer’s. The group will hold a car wash in June to raise money for a scholarship fund in the name of June Kelly, a history teacher who died suddenly.

Some of the honor students were also part of the entertainment.

The Wind Symphony, under the direction of Jason Bielik, and the Advanced Vocal Ensembles, under the direction of Michelle Blake, performed for the seniors before lunch was served.

The instrumentalists filled the stage and the vocalists stood in front. The groups performed a selection of music from the Baroque Era to the present day.

Elders from Ashby, Townsend and Pepperell, the three towns in the district, were invited to the event, Hamel said.

Because of the tight parking at the school, buses transported the seniors from Townsend and Pepperell.

The meal of chicken piccata, rice pilaf, dilled carrots, rolls and butter, and tossed salad was catered by Mark Lynch. He is well-known in the community for the Thanksgiving meals he prepares for area senior centers every year.

“He’s a very awesome man, very thoughtful, very kind,” Hamel said.

At dessert time, he had some help. Students supplied the home-made goodies.

“They’re a nice group of kids, very dedicated and involved in a lot of things. They’re good kids,” Morin said.