Code.org
Code.org is an American site but still covers the national curriculum for computing. Every pupil in the school has an individual code.org account and limited pupil information is inputted to the site - their first name, surname, age and the class they are in. Below are links to code.org’s privacy policies:
https://codeorg.medium.com/code-orgs-commitment-to-student-privacy-earns-accolades-cae1cca35632
