Collective Teacher Efficacy · d = 1.57

The most powerful
force in education
is already here.

Mentorful is a learning operating system for schools — part platform, part professional development, part coaching. It helps you measure and build Collective Teacher Efficacy, the #1 factor in student learning, through co-mentoring, structured PLCs, and data that actually means something.

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Hattie Effect Sizes · What Actually Moves Student Learning
Teacher Performance Pay
d = 0.05
Mindfulness Programs
d = 0.29
Inquiry-Based Teaching
d = 0.40
Prior Academic Ability
d = 0.94
Metacognitive Strategies
d = 1.29
Collective Teacher Efficacy
d = 1.57
Source: Hattie (2016) · 60,000+ studies · 80 million students
What Is CTE

It's the
"we've got this"
feeling. Built.

Collective Teacher Efficacy isn't a mood or a culture initiative. It's a measurable shared belief — and it has four specific components that Mentorful is designed to develop, one co-mentoring conversation at a time.

Mastery
Teachers seeing peers solve real problems builds belief that they can too
Vicarious
Structured classroom visits create learning without the pressure of evaluation
Social
Meaningful peer feedback changes what teachers believe about their own capacity
Affective
Psychological safety in the building makes everything else possible

Collective Teacher Efficacy is the shared belief of teachers in their combined ability to positively affect students — even those who are unmotivated or have difficult home lives.

Jenni Donohoo · Collective Efficacy (2017)
Five Enabling Conditions Mentorful Structures Into Practice
Empowered Teachers — agency in their own professional growth
Cohesive Teacher Knowledge — shared language across departments
Goal Consensus — aligned direction without top-down mandates
Supportive Leadership — administrators who protect the work
Embedded Reflective Practice — growth woven into the school day
The Mentorful Process

You're convinced.
Here's what's next.

Most people find Mentorful through a talk or workshop. You already know CTE is real. This is the path from curious to running a co-mentoring culture in your school.

STEP 01
📊
See Where You Stand
The School Culture Scan gives you a baseline on Collective Teacher Efficacy — what your staff believes, where trust lives, and where it doesn't. You can't build what you can't measure.
STEP 02
🎯
Know Your People
The Teacher Diagnostic PD maps each teacher's personality archetype, DiSC style, and domain strengths — then surfaces the co-mentoring pairs with the highest potential for mutual growth.
STEP 03
🔧
Build the Structure
The Initiative Launch Playbook wraps co-mentoring infrastructure around a live school initiative — so your next big idea actually takes hold instead of quietly fading out.
STEP 04
🏛
Develop Your Team
PLC Facilitator Certification and Data Analysis Certification build internal capacity — so the work doesn't depend on outside consultants. Your people run the rooms where change happens.
STEP 05
🗺
Go District-Wide
Leadership Strategy Consulting designs a full co-mentoring architecture across your district — influence networks, PLC ecosystems, and data systems that scale without losing fidelity.
START HERE
☕
Not Sure Where to Begin?
Book a free 15-minute call. We'll listen to where your school is, tell you which step makes sense first, and be honest if Mentorful isn't the right fit.
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Products & Services

Every school
has a first step.

Whether you're starting with a survey or redesigning professional development district-wide — Mentorful meets you where you are and builds from there.

Measure
School Culture Scan
A foundational survey of your staff's collective beliefs — where trust is strong, where it's fragile, and what the data says about readiness for change.
Measure
CTE Survey Battery
Quarterly deep-dive surveys with correlation network analysis and belief structure reports. Track how collective efficacy grows over time.
Know Your People
Teacher Diagnostic PD
A professional development experience that maps each teacher's archetype, DiSC style, and domain strengths — then builds the co-mentoring pairs with the highest growth potential.
Build the Structure
Initiative Launch Playbook
90-day co-mentoring infrastructure designed around a live school initiative. Give your next big idea the relational backbone it needs to actually take hold.
Develop Your Team
PLC Facilitator Certification
6-week cohort certification for the people who run the rooms where change happens — Clinic, Toolbox, Task Force, and Data Dive facilitators.
Develop Your Team
Data Analysis Certification
Train your internal team to read CTE data, interpret correlation networks, and use influence maps to make smarter decisions about professional development.
Go District-Wide
Leadership Strategy Consulting
12–18 month partnership to design a full co-mentoring architecture across your district. Influence network mapping, PLC ecosystem design, data infrastructure, and leadership coaching — built to last without us.
What Moves the Needle · Hattie Effect Sizes
Teacher Pay for Performance
0.05
Mindfulness Programs
0.29
PBL / Inquiry Learning
0.40
Metacognitive Strategies
1.29
Collective Teacher Efficacy
1.57
HATTIE (2016) · META-ANALYSIS · 60,000+ STUDIES
Why Mentorful

Built on trust.
Measured in growth.

🔗
Crosses the Silos
Co-mentoring pairs are cross-departmental by design. The math teacher and the English teacher have more to teach each other than two math teachers do.
📡
Surfaces the Influence Network
Every school has informal teacher leaders whose influence spreads ideas. Mentorful maps them and puts them to work — intentionally.
📈
Data That Builds Trust
Sensitivity, specificity, correlation networks. Metrics designed by a data scientist — built to be honest about what they know and what they don't.
🛡
Change That Actually Sticks
Co-mentoring pairs become the relational backbone for every new initiative. When teachers trust each other, new ideas spread — not from the top down, but from colleague to colleague.
From the Field
"

For the first time, my teachers are having real conversations about their practice — not because I told them to, but because the structure made it natural.

—
Principal · Pilot School
QUOTE COMING SOON
"

I've been in education for 18 years. This is the first professional development tool that actually respects that teachers are professionals.

—
Teacher · Pilot School
QUOTE COMING SOON
Currently in pilot. Real testimonials coming Spring 2026.
Free Consultation

15 minutes.
No pitch. Just a conversation.

Tell us where your school is. We'll tell you what we'd do first — and be honest if Mentorful isn't the right fit right now. No obligation, no sales deck.

✓  Free, no strings attached
✓  For principals & district leaders
✓  Honest about what fits
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