The links below should help you to revise the KU content of the Showtime unit.
From BBC Bitesize –
You might be able to find other revision material by searching for ‘KS3 Science revision’ and adding the part of the topic you are interested in – e.g. ‘KS3 Science revision Electricity’.
If you find anything that you think is really good, copy the link and add it to the comments below.