How to keep the fish cool in the classroom?

My mom has a 10 gallon tank with a couple of gold fish, in her classroom . On the weekends they cut the a/c off. So when she has come back to school on Monday a couple of the fish have died. Does anyone have a suggestion of how to keep the fish cool on the weekends?
She’s doing summer school, so she’s hoping to keep the fish for summer session.

i have to agree with whoever said they are dying of starvation. Ive kept fish for many years in homes with no A/C…
If you really think that is the problem then try using a desk fan on low setting? Keep the tank in the shade or pull the blinds shut. Use a bubbling stone too.