TORONTO — Four of the largest school boards in the Canadian province of Ontario said Thursday they launched lawsuits against TikTok , Meta and SnapChat alleging the social media platforms are disrupting student learning.

The lawsuits claim platforms like Facebook and Instagram are “designed for compulsive use, have rewired the way children think, behave, and learn" and teachers have been left to manage the fallout.

Meta Platforms Inc. owns Facebook and Instagram, while Snap Inc. owns SnapChat and ByteDance Ltd. owns TikTok.

Dozens of U.S. states, including California and New York, are also suing Meta Platforms Inc. for harming young people and contributing to a youth mental health crisis by knowingly and deliberately designing features on Instagram and Facebook that addict children to its platforms.

The school boards in Canada suing are the Toronto District School Board, the Peel District School Board, the Toronto Catholic District School Board and the Ottawa-Carleton District School Board.

They are seeking damages for disruption to student learning and the education system.

“The Defendants have acted in a high-handed, reckless, malicious, and reprehensible manner without due regard for the well-being of the student population and the education system,” according to a statement from the school boards.

A spokeswoman for Snap Inc., Tonya Johnson, said Snapchat helps its users stay connected with their friends.

“Snapchat opens directly to a camera — rather than a feed of content — and has no traditional public likes or comments,” she said. “While we will always have more work to do, we feel good about the role Snapchat plays in helping close friends feel connected, happy and prepared as they face the many challenges of adolescence.”

Representatives of Meta and ByteDance didn’t immediately respond to messages seeking comment.

Duncan Embury, a lawyer for the firm representing the boards, said in the statement the most advanced tech developers in the world have knowingly and negligently designed their products to maximize the amount of time young people spend on their platforms at the expense of their wellbeing and education.

“Social media companies should be held accountable for their negligence and the harm they have caused to our schools, and our community at large,” he said.

The use of social media among teens is nearly universal in the U.S. and many other parts of the world. Almost all teens ages 13 to 17 in the U.S. report using a social media platform, with about a third saying they use social media “almost constantly,” according to the Pew Research Center.

In May, U.S. Surgeon General Dr. Vivek Murthy called on tech companies, parents and caregivers to take “immediate action to protect kids now” from the harms of social media.

This week, Republican Florida Gov. Ron DeSantis signed a bil l that will ban social media accounts for children under 14 and require parental permission for 14- and 15-year-olds. It takes effect Jan. 1 and is expected to face legal challenges.