Yet in a typical school system, both groups receive tenure.
Clearly, though, this is not a typical school.
"There isn't really a typical school trip," says headteacher Alison Ewins.
At the typical school, two steps forward were often followed by one step back.
The typical school breakfast consists of cereal, milk, juice and toast.
The typical school day used to begin with chants against America for killing Iraqi children and burning Iraqi trees.
However, the steady progress at the state level masked an uneven, zigzag pattern of improvement at the typical school.
On a typical school day, 327,000 pupils were out of school, compared with 370,000 the year before.
Despite that, so many have been signed that the typical school PFI is now negotiated within 25 months, nine months faster than average.
In the advertisement, a montage of typical school scenes gives way to teachers speaking about their efforts to help students learn.
AS the summer unfolded, students settled quickly into their routines and the academy's classroom scenes came to resemble those at a more typical school.
