Rewarding underperforming schools

Teachers often complain that schools get bonuses for good performance
on stardard tests, because then suburban schools with smart kids
get the money. Now California is doing just the opposite, and rewarding the worst schools:

SACRAMENTO - About one in three of the state's worst-performing schools will get a share of nearly $3 billion in funding dedicated to helping them improve academic achievement. ...

The $2.9 billion package is part of a deal between Gov. Arnold Schwarzenegger and the state's largest teachers' union, the California Teachers Association ...

I guess that is what the teachers' union wanted.