| Chemistry | IPC | Pre-DIP Chemistry | Environmental |
| 1st 9 weeks 2008 | 1st 9 weeks 2008 | 1st 9 weeks 2008 | 1st 9 weeks 2007 |
| 2nd 9 weeks 2008 | 2nd 9 weeks 2008 | 2nd 9 weeks 2008 | 2nd 9 weeks 2007 |
| 3rd 9 weeks 2009 | 3rd 9 weeks 2009 | 3rd 9 weeks 2009 | 3rd 9 weeks 2008 |
| 4th 9 weeks 2009 | 4th 9 weeks 2009 | 4th 9 weeks 2009 | 4th 9 weeks 2008 |