We've started all the background chemistry etc and are starting the 4 weeks of practicals from next monday. I'm doing the decomposition of Hydrogen Peroxide using yeast. I'm varying Peroxide Concentration, Yeast Concentration, Temperature and also replacing the yeast with a d-block catalyst (Copper(II) Oxide and Manganese(IV) Oxide). We did some prelims this last week and it was quite temperamental due ti temperature fluctuations between different times of the day, but really I just want to get it over and done with now. Our school has been a bit rubbish with it, they've not given us a lot of support and then wonder why we aren't meeting deadlines.