Usually the coaching Institutes, particularly Resonance has separate batches of students joining at separate levels, say those joining before 11th, those joining in 11th and those after 12th. However after the first reshuffle test, the students might be placed in a mixed way. In any case the faculties aren't just assigned to selective batches and a good or even the best faculty may be teaching both the first and the last batch. So the batches given are usually all of the same level if talking in respect to faculty. If you want to change the batch, perform well in the reshuffle tests and see where you get.