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A cost-effectiveness analysis of classwide math intervention.

Courtenay A Barrett1, Amanda M VanDerHeyden2

  • 1Michigan State University, United States of America.

Journal of School Psychology
|June 17, 2020
PubMed
Summary

This study evaluated the cost-effectiveness of a math intervention for students. For fourth-graders, it cost $169.07 per student for a one standard deviation increase in test scores.

Keywords:
Classwide interventionCost-effectivenessEconomic evaluationMathNumber-needed-to-treat

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Area of Science:

  • Educational Psychology
  • Economics
  • Intervention Science

Background:

  • Schools face resource limitations, necessitating evaluation of intervention costs alongside effectiveness.
  • Cost-effectiveness analysis (CEA) provides a framework for quantifying the ratio of intervention costs to their outcomes.
  • Understanding the financial implications of educational interventions is crucial for informed decision-making.

Purpose of the Study:

  • To calculate the cost-effectiveness of a classwide math intervention for fourth- and fifth-grade students.
  • To provide an overview of CEA methodology for a broader audience.
  • To determine the cost per student for specific academic gains and for preventing assessment failures.

Main Methods:

  • Secondary data analysis from a randomized controlled trial (N=537) involving fourth- and fifth-graders.
  • Utilized the ingredients method to calculate costs associated with the math intervention.
  • Calculated incremental cost-effectiveness ratios (ICERs) and number-needed-to-treat (NNT).

Main Results:

  • For fourth-graders, the ICER was $169.07 per student for a 1 standard deviation increase in state assessment scores.
  • For fifth-graders, no significant effect was found on state assessments, but curriculum-based measurement (CBM) scores improved.
  • Fifth-grade ICERs for CBM improvements ranged from $65.08 to $469.12. NNT was $126.90 to prevent assessment failure for specific fourth-grade subgroups.

Conclusions:

  • The math intervention demonstrated cost-effectiveness for fourth-graders on state assessments.
  • Results for fifth-graders suggest targeted benefits on CBMs, with varying cost-effectiveness.
  • CEA provides valuable data for resource allocation in educational settings, particularly for at-risk student groups.