I found this helpful in learning and teaching conjunctions:
A WHITE BUS
Although we arrived on time, the bus left without us. Whenever this kind of thing happens, it makes me so upset! Our coach said we could get to the game however we wanted. If the bus company posts a schedule, they should stick to it. Though no one would call me punctual, we were there on time. Even if everyone was ready to go, the shouldn't have left early. Because we missed the bus, we might miss the game. Our coach will be upset unless we're there on time. Since this wasn't our fault, maybe he'll forgive us.