Schools in several major cities in Canada have initiated legal actions against social media corporations, including Meta Platforms Inc.’s Facebook, alleging that these platforms hurt children’s mental health and educational progress. On Wednesday, school districts from Toronto, Ottawa, and Peel Region launched individual lawsuits, collectively seeking damages amounting to approximately $4.5 billion. The legal actions against Meta, TikTok owner ByteDance Ltd., and Snapchat parent Snap Inc.