Twinkl
https://www.twinkl.co.uk
This is more for printouts, and usually at a fee, but they are offering a month of free access to parents in the event of school closures.

Andy Pidcock has a youtube channel and we often use his videos as part of a music session. https://www.youtube.com/user/andypidcock

Topmarks web sites have a range of activities related to English, Maths and topic subjects. https://www.topmarks.co.uk/

A lovely Phonics site with some free resources to access like a letter sound board and a song https://www.readwithphonics.com/

Phonics printable resources http://www.letters-and-sounds.com/phase-2-resources.html

Colouring pages for all sorts http://www.coloring-book.info/coloring/

BBC Learning
http://www.bbc.co.uk/learning/coursesearch/
This site is old and no longer updated and yet there's so much still available, from language learning to BBC Bitesize for revision. No TV licence required except for content on BBC iPlayer.

Blockly
https://blockly.games
Learn computer programming skills - fun and free.

Ted Ed
https://ed.ted.com All sorts of engaging educational videos

Scratch
https://scratch.mit.edu/explore/projects/games/
Creative computer programming

National Geographic Kids
https://www.natgeokids.com/uk/
Activities and quizzes for younger kids.

Mystery Science
https://mysteryscience.com  Free science lessons
 

The Kids Should See This
https://thekidshouldseethis.com
Wide range of cool educational videos

Crash Course Kids
https://m.youtube.com/user/crashcoursekids
As above for a younger audience

Crest Awards
https://www.crestawards.org
Science awards you can complete from home.

iDEA Awards
https://idea.org.uk
Digital enterprise award scheme you can complete online.

Paw Print Badges
https://www.pawprintbadges.co.uk
Free challenge packs and other downloads. Many activities can be completed indoors. Badges cost but are optional.

Tinkercad
https://www.tinkercad.com
All kinds of making.

Prodigy Maths
https://www.prodigygame.com
Is in U.S. grades, but good for UK Primary age.

Cbeebies Radio
https://www.bbc.co.uk/cbeebies/radio
Listening activities for the younger ones.

Nature Detectives
https://naturedetectives.woodlandtrust.org.uk/naturedetectives/
A lot of these can be done in a garden, or if you can get to a remote forest location!

British Council
https://www.britishcouncil.org/school-resources/find
Resources for English language learning

Oxford Owl for Home
https://www.oxfordowl.co.uk/for-home/
Lots of free resources for Primary age

Geography Games
 https://world-geography-games.com/world.html
Geography gaming!

Blue Peter Badges
https://www.bbc.co.uk/cbbc/joinin/about-blue-peter-badges
If you have a stamp and a nearby post box

The Artful Parent
https://www.facebook.com/artfulparent/
Good, free art activities

Red Ted Art
https://www.redtedart.com
Easy arts and crafts for little ones

The Imagination Tree
https://theimaginationtree.com
Creative art and craft activities for the very youngest.

Toy Theater
https://toytheater.com/
Educational online games

DK Find Out
https://www.dkfindout.com/uk/?fbclid=IwAR2wJdpSJSeITf4do6aPhff8A3tAktnmpaxqZbkgudD49l71ep8-sjXmrac
Activities and quizzes