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Six Research Domains · Decades of Evidence

Clarity is the
organizing mechanism
of human performance.

From classrooms to boardrooms — when people have clarity about what they're doing, why it matters, and what success looks like, they achieve more. Here's what the research says.

Explore the research
0×
Teacher Clarity Effect Size
0+
Goal-Setting Studies
0%
Specific Goals Outperform Vague Ones
0
Research Domains
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Highest Effect Size — Collective Teacher Efficacy
Six Interconnected Domains

Clarity shows up everywhere.

Whether you're a teacher, a leader, a parent, or a professional — the research on clarity applies to you.

The Central Thesis

Clarity is not a soft skill or an administrative nicety. It is the organizing mechanism of human performance.

When students have it, they learn. When teachers have it, they teach better. When principals have it, they lead. When districts have it, they cohere. When parents have it, they engage.

And when all five levels have it — and they are aligned with one another — something extraordinary happens.

Explore the Full Synthesis →
The Numbers

What does the research actually say?

Effect sizes measure impact. A 0.4 = one year's growth for one year of schooling. Look at what clarity achieves.

Student Self-Reported Grades (knowing what success looks like) 0.96
Benchmark (0.4)
Hattie · Among the highest-leverage student interventions known — when students truly understand what success looks like, they exceed expectations. Source: Visible Learning MetaX ↗ · 6 meta-analyses · 218 studies · 23,168 students
Teacher Clarity (clear learning intentions & success criteria) 0.85
Benchmark (0.4)
Hattie · Nearly double the benchmark. The single most studied instructional practice. Source: Visible Learning MetaX ↗ · 3 meta-analyses · 101 studies · 14,853 students
Specific vs. Vague Goals (Locke & Latham) 0.42–0.80
Benchmark (0.4)
Locke & Latham · 400+ studies over 35 years. Clear goals outperform vague ones 90% of the time.
The orange marker shows the 0.4 hinge point — the threshold for one year's typical academic growth. Anything above it matters.
"Clear is kind. Unclear is unkind."
— Brené Brown, Dare to Lead (2018)
"Clarity + alignment = coherence. Coherence is the most underrated driver of school performance."
— Fullan & Quinn, Coherence (2016)
Ready to go deeper?

Start with the flagship domain.

Five levels of an educational system — student, teacher, leader, district, parent — and what happens when clarity connects them all.