Visible Learning: Understanding John Hattie’s Research on Effect Sizes of Teaching Strategies

Written based on research and content developed by Dr. Sandra Markowitz, an experienced educator with 17 years in the field of Instructional Technology. Passionate about assistive technology, Universal Design for Learning, instructional strategies, and workflow solutions, Sandra brings innovative approaches to her teaching.

In education, one big question drives nearly every decision: What actually works to improve student learning? Visible Learning, a comprehensive synthesis of research by Professor John Hattie, sets out to answer that question.

Hattie analyzed over 1,800 meta-analyses and 300 million students, ranking strategies by “effect size” to show their impact on student achievement. An effect size above 0.4, the “hinge point,” is considered significant.​

The strength of Visible Learning is its ability to help educators focus resources. Hattie’s research identifies what makes the biggest difference, clarifying which investments are most likely to succeed.

Why Effect Size Matters

Effect size isn’t just academic jargon; it’s a tool for action. It quantifies the impact of a practice on learning. For example, Response to Intervention (RTI) has an effect size of 1.07, far above the hinge point, suggesting it has more than double the impact of a minimally effective strategy. This kind of data makes the case for protecting intervention funding or restructuring schedules to allow for targeted support.

Similarly, Collective Teacher Efficacy, the belief among educators that they can positively impact student outcomes, has an effect size of 1.57, the highest in Hattie’s research. That’s not just a “feel-good mindset,” it’s a high-leverage lever for growth.

The Four Most Powerful Strategies and How to Apply Them

1. Collective Teacher Efficacy (Effect Size: 1.57)

When educators believe they can make a difference, students do better. This isn’t about isolated excellence; it’s about a unified team effort. At the school level, this might look like building a culture of collaboration through professional learning communities (PLCs), shared data review sessions, and intentional co-teaching models.

How Progress Learning helps: Our platform provides teams with real-time data and insights, enabling actionable collaboration on student growth. Shared, aligned goals and visible results boost both teacher confidence and student achievement.

2. Assessment-Capable Learners (Effect Size: 1.44)

Assessment-capable learners answer three questions: Where am I going? Where am I now? What’s next? Schools foster this through metacognition and ownership. This means clear success criteria, student goal-setting, and regular self-reflection.

How Progress Learning helps: My Study Plan shows students’ mastery by standard, highlights goals, and provides instant feedback to guide learning.

3. Self-Reported Grades / Student Expectations (Effect Size: 1.33)

When students set goals and estimate their performance, achievement increases. It’s not just prediction, it’s intention. Educators can embed this by having students track their progress, set learning goals, and regularly reflect on their growth.

How Progress Learning supports this: Students using Study Plans can see their own progress and reflect on performance. They’re encouraged to make data-driven adjustments and set learning goals aligned with their state standards.

4. Response to Intervention (RTI) (Effect Size: 1.07)

RTI works best when it’s timely, targeted, and data-driven. Schools need structured Tier 2 and Tier 3 supports, regular data reviews, and interventions tailored to specific gaps.

How Progress Learning supports this: Our adaptive intervention program, Liftoff, automatically targets skill gaps based on diagnostics like NWEA MAP data. That means districts don’t need to start from scratch to create intervention plans; students can immediately begin targeted practice that adapts as they grow.

Other High-Impact Practices and How to Bring Them to Life

In addition to the top four, Hattie’s research surfaces other practices that yield strong returns:

• Classroom Discussion (0.82): Promote student-led learning conversations. Use Progress Learning’s data to identify and discuss misconceptions.
• Scaffolding (0.82): Gradually release assignments. Teachers assign practice with hints and guided questions on our platform.
• Deliberate Practice (0.79): Assign specific practice around learning goals. Study Plans and structured question sets in Progress Learning support this.
• Teacher Clarity (0.75): Set clear expectations. Our tools show exactly which standards each question meets and track progress.
• Feedback (0.70–0.73): Provide real-time, actionable feedback. Progress Learning does this automatically, helping students course-correct instantly.
• Formative Assessment (0.48): Use Quick Checks or exit tickets to adjust instruction. Our assessments enable this flexibility.
• Small Group Instruction (0.46): Group students by need using data insights from our reports.

The Bottom Line

Hattie’s research gives educators a data-driven map to maximize impact. Progress Learning embeds high-impact strategies into daily practice.

From empowering teacher teams to accelerating the progress of struggling learners, we’re here to help your district focus on what works and make it visible. Get in touch below to see how Progress Learning can help you be as effective as possible.

References:
Hattie, J. (2008). Visible learning. Routledge.