In the UK the beginning of Secondary School is Year 7 when children are typically 11 years old. Here are a few ideas on how to prepare over the summer holiday before starting.
Read a lot
A visit online or to your favourite book store is useful to start reading books which are a notch more difficult than what your child may have been used to. Of extra value are non-fiction books such as encyclopaedias covering subjects such as Geography and History.
Following on from the point above, listening to audio books (fiction and non-fiction) aimed at early teens is a useful way to help increase vocabulary and the complexity of sentence structure.
Yes I hate to say, but buying a few Year 7 / KS3 workbooks is a good idea – not to finish but at least to have a go and to understand some of the key concepts especially in Maths. Always useful is to start working on more complex algebra and geometry.
It almost doesn’t matter what a child wants to write about, but it is worth a child spending a good amount of time every week over the summer holiday writing about anything. It’s useful to mix this 50/50 writing by hand and writing on a computer. This is also a useful time to build vocabulary and practice more complex sentence structures.
Compared to Primary School there’ll be a lot more work at school and home work, so you’ll need to figure our what works best for your child in terms of keeping track of everything. I’m a fan of using post-it notes on the wall above a child’s desk to keep track of Mon-Fri and also Sat & Sun for the homework schedule. A whiteboard is also a great idea which enables the child to draw out their own organisation.