Farming
Lots of information about farming, there are free downloads some really interesting materials, some premium features.
Craft
https://thecraftyclassroom.com/
Lots of free resources , although it is a little ad heavy its worth a look as it covers many different topics.
Curriculum (UK)
This covers all curriculum subjects and is a great starting point for any age. I particularly like the Modern Foreign Language section as quality free resources are hard to come by. It provides links to external websites based on subject and BBC media related items.
Curriculum based resources, requires sign up but there are lots of free taster resources.
Geography
https://www.ordnancesurvey.co.uk/mapzone
Online games and high quality information and materials, printables can be found in the resources and links section in the top right.
General Education
https://www.enchantedlearning.com
Provides some free worksheet printables, not of particularly high quality but they cover many topics.
http://www.1plus1plus1equals1.com/index.html
Lots of free resources, some are good quality but very ad heavy.
Requires sign up, offers free account with lots of free resources. Offers a variety of teaching styles: Montessori
Requires sign up, free sign up offers a large variety of free sample worksheets which are good quality.
Little Simple Family {LSF} 