Repetita Iuvant? A Repeated Randomized Controlled Trial on the Effectiveness of an At-Scale Teacher Professional...

Area of Science:

• Educational Psychology
• Program Evaluation
• Educational Interventions

Background:

• Program effectiveness is often linked to implementation quality, yet this is understudied in small-scale randomized controlled trials (RCTs).
• Replicated RCTs offer a valuable method to assess implementation's role in program outcomes at scale.

Purpose of the Study:

• To evaluate the effectiveness of a year-long, at-scale professional development program for lower secondary math teachers.
• To investigate how variations in program implementation across two distinct cohorts influenced student math achievement.

Main Methods:

• Two repeated, at-scale randomized controlled trials (RCTs) involving two cohorts of teachers and students over three years.
• Student math achievement was measured using standardized assessments, comparing treatment and control groups.
• Implementation fidelity was assessed by examining changes in enrollment, teacher collaboration, and integration of new teaching methods.

Main Results:

• The initial cohort showed no significant impact on student math achievement.
• The second cohort demonstrated a positive, persistent effect on student math achievement.
• Improved implementation strategies in the second wave correlated with the enhanced program effectiveness.

Conclusions:

• Implementation fidelity is crucial for the success of large-scale educational programs.
• Repeated evaluations of scaled interventions are essential for identifying and rectifying implementation issues.
• Optimizing program implementation can significantly enhance educational outcomes and student achievement.