Complex sentence: Students in the sections A, C, E, G, and so on are scheduled in the morning class, while students in the sections H, J, K, M, onwards are placed in the afternoon class.
Split into simpler sentences: Students in the sections A, C, E, G, and so on and so forth are scheduled in the morning class. While students in the sections H, J, K, M, onwards are planned in the afternoon class.