Leaving the lesson and performing Salaah

I am taking an online aalimah course and because of time differences, South African time goes from before maghrib 6:00 to 8:30 after esha has already set in. The asaatizah have told us that we should leave for salaah and catch up with the missed portion of the lesson later.i.e. We definitely shouldn't miss our Salaah for classes. Our first lesson completes at 7:00 or 6:45 depending on subject and day. Can I wait for the first lesson to complete and then read my maghrib Salaah before the next subject or should I immediately leave the lesson and catch up later?