I was going to post some clever comment about the school needs to do better or you need to plan further ahead but it is much simpler - its the joys of flying - you learn quick enough that some schools are run like members clubs, you the member does, and some like businesses, you learn winter mornings bring frost and frost can take ten minutes or 40 to remove (if possible get the aircraft facing into sun, it makes a world of difference, just a little warmth breaks the bond between wing and ice), in short you learn what to expect and just like flying lessons once learnt probably no need to repeat.
In short find me a pilot that wasnt once just where you were. I was - in fact worryingly more than once, me just not a quick learner it would seem. All i can add is when it comes to the actual flying try a learn the lesson first time, mistakes are less easily forgiven.