I mean I'm not surprised but Bitesize is used by schools through the country as a supposed reliable, unbiased source of education material.
mobile.twitter.com/SafeSchools_UK/status/1319025713475952641?fbclid=IwAR0rTBD2j5PKOeTKvYSSX90c4RUDmJDo7Zg613qnDBXNaAncv3J8epYWLSQ
You can complain here:
www.bbc.co.uk/contact/complaints/make-a-complaint
Or email your MP and cc MPs Safe Schools Alliance on info@safeschoolsallianceuk.
In the tweet thread there are some people already complaining. I'm not a defund the BBC kind of person but I can see why license fee layers are questioning what the BBC are doing with their money (there is a website 'BBC complaints' that's all about biased Brexit coverage).