More and more people 'are thinking' (tutaj mozna napisac 'conside') that school shops shouldn't sell sweets and fast food. This 'solution' (nie, bo tutaj mowisz o pukt widzenia, cos takiego) has both advantages and disadvantages.
On the one hand, a lot of students want to eat chips, (tutaj trzeba dodac 'chocolate') bars or junk food sometimes.
Moreover, 'it' (daj tutaj slowo 'this' bo mowisz dalej o tym samym)can 'make' (zle slowo, tutaj 'give' - dac im) a lot of 'fun' (lepsze slowo 'pleasure) for them. In addition, sellers may earn some extra money, which can be dedicated for trips or different 'pleasures' (nie, daj inne slowo). Last (daj tutaj przecinek) but not least is that some chocolate may improve your 'brain work' (wystarczy 'brain).
On the other hand, eating too many sweets and fast food 'have' (has, dlatego ze 'eating has consequences') tragic consequences for (brak przedimka 'the') health.
Besides, more pupils spend too much cash 'on' (in-w) school shops. A lot of parents give their children pocket money and the students often 'lay out' (to troche kolokw - lepiej 'spend) all of 'them' (tutaj 'it' money-it) for sweets! Apart from that, in some situations 'it causes' (nie, zrob 'this can cause') sugar addiction 'and needs' (moze 'requiring' albo 'needing') special treatment.
In conclusion, 'this solution' (nie, bo nie alej 'solution' lepiej 'problem' czy cos podobnego) has a lot of benefits (przecinek) but also some 'bad sides' (moze 'disadvantages'). To my mind, selling sweets and fast food in school shops is a great option, (tutaj mozna dodac 'as it may teach children responsibility for their own health-daj to po swojemu).