Here is a link to the official guidance on the Year 4 multiplication check. 

Using TT Rockstars is a fantastic way for children to build confidence and fluency in their times tables, which are a key foundation for success in maths. When children can recall multiplication facts quickly and accurately, they are able to focus more easily on solving problems and understanding new mathematical concepts, rather than getting stuck on basic calculations. TT Rockstars makes practising engaging and motivating through fun games and regular repetition, helping children to improve their speed and accuracy over time. It also plays an important role in preparing pupils for the Year 4 Multiplication Tables Check (MTC), where quick recall is essential. Regular use at home and in school will support children in becoming more fluent, confident mathematicians.

Link to TT Rockstars