thank you for your reply, Ben. I have another question: I can ask it here directly or open a new one, as you prefer. anyway your reply was good, so i will give you a good rate :)
the other question is: is it a valid contract to sign? Can they do this thing, of having you signing another contract with a payroll agency and make it appear that you are an employee of the payroll agency (it is actually "asset services", maybe you heard of it), and THEN, as an employee of the payroll agency, you sign with them as a consultant, AND your performance as a consultant is "science teacher" for the Client, that is the school?
Are you actually legally entitled to sign such a contract? this is what mostly was strange to me, and the fact that at the end of the contract I should confirm the bank details of "asset services", so that money will pass:
1) from the school to the recruitment agency
2) from the recruitment agency to the accountants' company
3) after taxation, from the accountants' company to me.
So, THE QUESTION IS: can I actually sign a contract where I, as an employee of the accountants' company, work as a consultant for the recruitment agency? (and PRACTICALLY teach science in school? )