What do teachers and the public think about having at least some of teacher pay related to student achievement?  According to an EducationNext poll:

Fifty-seven percent of the public supports “basing part of the salaries of teachers on how much their students learn,” while 31% opposes this idea. Among teachers, however, just 21% support merit pay and fully 73% are opposed.

Here is a policy paper from a group of public school teachers (part of the 21% minority) that outlines the incentive problems with step & lane.