As you will know, a major emphasis at Project HappyChild is on free educational resources. What appeared to have been *missing* from education generally, was a "common frame of reference" to which all children could relate.
With this new area at Project HappyChild , rather than just create some "boring lists" we've taken the approach of using "wordsearches" that kids can do and assimilate the keywords and linked items in the process.
Working with Mario Becroft in New Zealand (to whom we are indebted for his programming help and wordsearch program design), a whole massive area has now been created to provide a "common framework" across languages and science.
The "Spellings, Sounds and Meanings" area within "English" has its own set of wordsearches for the main spelling variables (along with worksheets for sentences, meanings, writing practice, making crosswords, lateral thinking, poetry-writing, etc).
Maths doesn't really lend itself to wordsearches :/ However, the Maths area is carefully structured to enable children to lay down a basic number framework and easily assimiliate the building blocks for addition, times tables, subtractiion and division, and also grasp the basics of fractions and percentages.