Teacher-student relationships Hattie highlights the extreme importance of the relationship between teacher and student in his identification of an effect size of d=0.72 linking student-teacher relationships to achievement. The individual effect sizes of 9 variables linked to teacher-student variables are shown below:
Teachers that are person-centred, show warmth and empathy, that embrace active learning and that encourage learning and deep thinking increase the achievement of their learners. This is a powerful set of findings that must be remembered when moving on to consider classroom rules.
Rules and Procedures Marzano suggests an effect size of d=0.76 for the influence of rules and procedures on student acheivement:
Marzano makes it clear that this effect size includes strategies to clearly express rules and expectations, and to justify them persuasively from the teacher’s and student’s points of view. A particular important effect size that he offers is d=0.52 for experimenting with improved classroom management techniques.
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Petty’s summary of disciplinary interventions Geoff Petty (2009) provides an invaluable summary of Marzano’s findings into the relative effect sizes of different disciplinary interventions. The importance of reminders is clear (perhaps reflecting it’s pre-emptive value in the practice of teachers with so called ‘with-it-ness’.) The value of rewards in modifying and controlling student behaviour is also well illustrated.
Adapted from Hattie (2009)
Effective learning requires a supportive environment   Hattie’s reported effect size of d=0.52 for the influence of well managed classrooms on achievement tells us what we already know- learning takes place best in the absence of disruption. Schools can do much through institutional measures to support student management, but again it is individual teacher practice that is paramount. Marzano provides an effect size of d=1.42 for teachers who possess a state of ‘with- it-ness’, those teachers that we have all met who have eyes in the backs of their heads and can predict that little Johnie will throw the scissors at Bill if he’s not warned in advance...   
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