What should one do if prayer is prohibited in secular schools three months before exams, while being unable to transfer to an Islamic school?

A Muslim must observe prayers at their appointed times and avoid schools that prevent this. If unable to move, he must perform the Dhuhr prayer at its time, even if alone; otherwise, he should combine it with Asr. The Friday prayer is waived if he has exerted his utmost effort to perform it but was unable to, in which case he should pray Dhuhr instead. Among the excuses for not attending congregational prayers and Friday prayers are: a person fearing for his life from an unjust ruler, or suffering harm to his livelihood.