Channel 4 has obviously got bored with promoting underage sex and general noncery (mini pops, teen big brother, skins...the list goes on) so they've gone for an old classic - the freak show.
Anyone at all duped by the claim that this is educational should consider the amused sounding narrator, the focus on their failures and the general sniggering tone. You're not watching it because you feel sorry for them or are genuinely interested, you're watching it to see a guy with a head shaped like a Nik Nak.
Awful show, Channel 4 should stick with their more popular and dignified shows, like that one where a woman divides up a fat girls crap with a plastic spoon and then gives out some diet advice.