School boards need to support principals in getting rid of marginal teachers. (educationworld.com)
They [have the ability to] bring out the best in the entire faculty by making marginal teachers better and better teachers the best.» (educationworld.com)
So in my mind, people who want the three - year probationary period are (perhaps inadvertently) asking to keep more marginal teachers in for a third year. (edsource.org)