08/27/2015 06:00 EDT | Updated 08/27/2016 01:12 EDT

Tennis balls for chair legs now 'suggested' school supply

Some teachers are suggesting that students include tennis balls on their school supply purchase list — and not for gym class.

Lists of suggested school supplies distributed by some Ontario teachers this year include a four-pack of tennis balls that students then attach to the bottom of classroom chair legs.

"Some teachers just find that tennis balls on the bottoms of chairs cuts down on noise when students are moving their chairs around, and makes it a little easier for smaller students to slide them around when doing group work," Stephen Fields, spokesman for the Windsor-Essex Catholic District School Board, said in an email to CBC.

One list distributed at Sacred Heart Catholic elementary school in LaSalle, Ont., west of Windsor, even suggests the balls be "already cut to cover chair legs."

Several dollar stores in the Windsor-Essex region sell packs of pre-cut tennis balls that can be slid onto chair legs.

Annie Kidder, executive director of People for Education, frowns on the idea of parents being given a list of school supplies to purchase.

"If it's an educational necessity, one would hope the cost of the tennis balls would be covered," Kidder said. "But I don't think it's an issue of tennis balls. It's the whole thing put together. It's the idea that I have to augment things which the school appears to be saying are necessary for my kids to go to school. It's not the things on the list … it's the idea that families have to pay to go to a publicly funded school."

Fields said the balls are not mandatory.

"We would certainly never expect that parents who may be struggling financially to make such a donation," Fields said in an email.

At the Greater Essex County District School Board, tennis balls are less common, said spokesman Scott Scantlebury.

"In the newer schools, the feet of the chairs is a consideration in the purchase process," he said in an email.

Tennis ball program

National Bank runs the On the Ball program, which donates used tennis balls to classrooms in Ontario and Quebec. The program started nine years ago.

Canadian tennis star Vasek Pospisil is a spokesman for the campaign.

"I just know when I was a kid how noisy the classrooms were and it's so hard to concentrate when anybody would move,"  Pospisil said in an interview with CBC last year. "To have that idea to put tennis balls on the bottoms of chairs is really great. It's something any school could use. It's going to help education and help the kids concentrate,"