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Version 1.1 – Updated August 2021

# Differentiation

## Overview

• Influence: Differentiation
• Domain: Student Learning Strategies
• Sub-Domain: Student-focused interventions
• Potential to Accelerate Student Achievement: Potential to accelerate
• Influence Definition: Differentiation refers to a wide variety of teaching techniques and lesson adaptations that educators use to instruct a diverse group of student. It can involved different activities to different groups of students, recognition of multiple pathways and time to complete the tasks

## Evidence

• Number of meta-analyses: 4
• Number of studies: 102
• Number of students: 9,579
• Number of effects: 197
• Effect size: 0.46

## Meta-Analyses

Meta-Analyses
Journal Title Author First Author's Country Article Name Year Published Variable Number of Studies Number of Students Number of Effects Effect Size
MathEd Database. Kim Korea A meta-analysis on the effects of differentiated instruction in mathematics. 2018 Differentiation 49 0 80 0.68
Frontiers in Psychology Smale-Jacobse, Meijer, Helms-Lorenz, & Maulana Netherlands Differentiated instruction in secondary education: A systematic review of research evidence. 2019 Differentiation 14 0 14 0.74
Review of Educational Research Puzio, Colby, & Algeo-Nichols USA Differentiated Literacy Instruction: Boondoggle or Best Practice? 2020 Differentiation in literacy 18 9,579 25 0.13
Educational Research Review Deunk, Smale-Jacobse, de Boer, Doolard, & Bosker Netherlands Effective differentiation practices: A systematic review and meta-analysis of studies on the cognitive effects of differentiation practices in primary education. 2018 Differentiation 21 0 78 0.30
TOTAL/AVERAGE 102 9,579 197 0.46

## Confidence

The Confidence is the average of these four measures, each divided into five approximately equal groups and assigned a value from 1 to 5 based on the following criteria:

• Number of Meta-analyses
• 1 = 1
• 2 = 2–3
• 3 = 4–6
• 4 = 7–9
• 5 = 10+
• Number of Studies
• 1 = 1–10
• 2 = 11–50
• 3 = 51–200
• 4 = 201–400
• 5 = 400+
• Number of Students
• 1 = 1–2,500
• 2 = 2,501–10,000
• 3 = 10,000–20,000
• 4 = 20,000–100,000
• 5 = 100,001+
• Number of Effects
• 1 = 1–100
• 2 = 101–300
• 3 = 301–600
• 4 = 601–1,200
• 5 = 1,200+
Confidences
Number of Meta-Analyses Number of Studies Number of Students Number of Effects Overall Confidence
Confidence Factor 3 3 2 2 3