This is an unbelievable funny series. The animation was made with Flash or something like that and isn't very impressive, but despite that fact the series is great anyway. The best part by far are the characters. It would take a lot of time to descrive them all but trust me they are almost perfect.
The only problem I see with this show is that I saw the complete first (and so far only) season way back in 2005 and no new episodes have been shown.

This is a damn funny series. I've read it described as an English version of 'South Park', but that's a silly claim. For a start it's about 3 girls, not 4 boys. Secondly, they are about 15, not 8. Thirdly the series is almost entirely set in in the school, and is ABOUT the school. We never see anyone's parents or much that happens outside of school hours. Lastly, it doesn't have a preachy, 'topic of the week' approach like South Park increasingly does. Instead it just has a warts and all approach to underfunded, working class high school life in England.

The central female characters, Keisha, Latrina and Natella, are hilarious. The headmaster is even more hilarious (he won the school in a poker game, and is always up to some criminal scheme or other). The teachers are hilarious. It doesn't go out of its way to beat South Park in the bad taste stakes. It just effortlesly manages it anyway. In the first episode, Latrina accidentally brings a baby to school instead of her lunch, because her mother had another one the other night, and she picked up the wrong parcel. It ends up being sold to to the sex education teacher, who thinks it's real, and has always wanted a baby. Oh yes, somewhere it gets swapped for a doll - I think by the evil science teacher played by Graeme Garden.

Damn, damn funny adult oriented series. Nothing like South Park.