Hmm I guess they are recruiters. All do not require cash to get a job. Basically they seem to go to the schools, veto them, check over the contract etc. and then provide you to the school providing all is well.

I am also applying to independant places but these organisations seem to offer a greater level of security, providing they don't do as you say and run off.

Sorry for seeming so clueless, I'm just trying to absorb all the information I can lay my hands on, all that seems to be doing is confusing me :/