BBC Bitesize - For all subjects in Key Stage 1 (Years 1 and 2) and Key Stage 2 (Years 3 - 6)
Scholastic Learn at Home - Cross-curricular journeys. Every day includes four separate learning experiences, each built around a story or video. Children can do them on their own or with their families.
Oxford Owl for Home - Lots of free resources for Primary age
Twinkl - This is more for printouts, and usually at a fee, but they are offering a month of free access to parents during school closures.
j2e - A child friendly version for word processing, spreadsheets, presentation and much more (Add this to your RMUnify LaunchPad)
Mystery Science - Free science lessons
Nature Detectives - A lot of these can be done in a garden, or if you can get to a remote forest location!
Scratch - Creative computer programming
National Geographic Kids - Activities and quizzes for younger children
Geography Games - Geography gaming!
Duolingo - Learn languages for free. Web or app.