I'm struggling to find online resources to use the summer to help 10yo revitalise some of his not-terribly good results this past few months. Vocabulary and creative writing mainly, though books to get him reading happily would help too. Anyone any suggestions?
He's in cuarto.

he could maybe write a diary?

why not just go to the library or bookshop & see what takes his fancy - they are usually sorted by age as well as category

any magazine really

this is a good site for up to 12 years old - educational games across the curriculum- you have to pay, but it's only 24€ a year http://www.nicoland.es/es/nicoland.asp