The gains in schools that received «high - dosage tutoring in math were
dramatic,» and the study found that although the tenets of the program worked together to produce strong
overall results, tutoring was, on its own, «highly effective in increasing
achievement.»
As a result of extensive meta - analytic work, Marzano, Waters and McNulty concluded: «A highly effective school leader can have a
dramatic influence on the
overall academic
achievement of students... Leadership has long been perceived to be important to the effective functioning of organisations in general and, more recently, of schools in particular.