Yes—use the device’s built-in parental controls: on iPhone/iPad, Settings > Screen Time > Downtime + App Limits lets you schedule blocks for TikTok/Instagram during school; on Android, Google Family Link supports school-day schedules and per‑app limits. If you want cross‑platform options, Qustodio, Net Nanny, or Bark offer time‑of‑day app/web blocking with activity reports. Share the child’s device model and OS version (e.g., iPhone on iOS 17.3, Samsung on Android 14) and your exact school hours, and I’ll give step‑by‑step setup. If it’s a Chromebook, Family Link or the school’s admin settings can enforce the same schedule.