Did not grow / school in the UK - what does this mean?

I have a 14 year old who has just completed mocks and did well.

Today I received an email from the school which included this line

I am writing to inform you [name redacted] will now be studying for the Separate Sciences. This means they will study for three Separate Science GCSEs (Biology, Chemistry and Physics).

What does this mean? Is it a good thing or a bad thing?
Marine Biology and Conservation is the ambition.

Submitted May 13, 2024 at 06:28AM by CrappyTan69 https://ift.tt/pZaMY4t