Steer clear

This is the worst company I have ever worked with!
They mascarade as a charity but it is to avoid taxes and the only person doing anything charitable is you (the senior teachers earn a higher annual salary). You will get up at 5 in your less than ideal accommodation, drive for 2 hours, turn up at a school with little or no information on what you will be doing that day and teach until 2, drive for another 2 hours and then attend pointless seminars.
On more than one occasion the school had no idea we were coming (a senior teacher let slip that if the school hasn't confirmed then a SALES tactic is to turn up anyway and the school will then feel obliged to hand over the daily salary they pay)
The company is a shambles, they have no respect for your time or the fact you are a volunteer. The administration is down right rude and obnoxious. I could write pages upon pages of examples of incompetency from the staff and company as a whole.
Just don't waste your time.