If your child turns 11 between 1st September 2020 and 31st August 2021, then they will transfer to secondary school at the start of the new school year in September 2021. The admissions applications window for secondary schools opened on 1 st August...
If you have chosen the UK to study, it is likely that the education system is quite different to what you are used to. You will experience a lot of different cultures in England, Wales, Scotland and Northern Ireland; also you will experience Asian, African, European, Indian and American cultures as well. This is because one in ten students that study in the UK comes from abroad.
International students can find themselves in difficult situations when at further or higher education, this could include: being accused of cheating or plagiarism, not attending classes or being withdrawn from a course because they have not completed an assignment on time, all very similar issues to non international students.
The fact that you are an international student does not mean you should be treated any differently to non international students. To avoid any unfair treatment you need to make sure you understand what you rights are by looking at university procedures - this will give you the best chance of completing your degree without encountering any trouble.