Sending 60 students home for one positive case means your school is being very cautious. This is not what is supposed to happen on the government website it says this
If a pupil tests positive, does their whole class or year group or other bubble then have to isolate as well?
No. It’s only people who live in the same household as someone with symptoms or who has tested positive or close contacts of people who have tested positive or have symptoms.
Close contacts are:
People who have had face-to-face contact including being coughed on or having a face-to-face conversation within 1 metre
People who have been within 1 metre for 1 minute or longer without face-to-face contact
Sexual contacts
People who have been within 2 metres of someone for more than 15 minutes (either as a one-off contact, or added up together over one day)
Travelled in the same vehicle or a plane
Anyway by isolating if you did catch it off them you are lowering the risk of further transmission. Don’t hate testing for all you know later on someone else being made to isolate might prevent you catching COVID.