🎓 For Teachers & Educators

Teach Online with
More Energy.
More Impact.

Free flipped classroom resources, online teaching strategies, and professional development for teachers who want to show up differently in the digital classroom — from a math professor who has been doing it since 2012.

▶️ YouTube Silver Play Button 🍎 Apple Distinguished Educator 📚 Peer-Reviewed Researcher 🎤 100+ Conference Talks 🌏 10+ Countries
Choose your path

Four ways Numberbender supports educators

Whether you're just starting with online teaching or ready to build a full content creator practice — there's a path here for you.

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Flipped Classroom for Teachers

A research-backed, step-by-step guide to flipping your classroom — whether you teach in-person, online, or hybrid. Based on Dr. E's peer-reviewed published research and 10+ years of classroom implementation across K-12 and higher education.

Read the guide →
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Free Teacher Resources

Templates, checklists, AI prompts, video setup guides, rubrics, and lesson frameworks — everything Dr. E uses in his own online classroom, packaged up and free to download. No email required for most.

Get free resources →
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Workshops & Keynotes

Bring Dr. E to your school, college, or conference. He delivers hands-on workshops, faculty development sessions, and keynotes on flipped learning, AI in education, and online teaching — in formats from 2 hours to a full semester of PD.

Book Dr. E →
Dr. Peter Esperanza — math professor and online educator
Why teachers trust Dr. E

He didn't just study online teaching. He built it from scratch.

In 2012, Dr. Peter Esperanza started recording math videos for his high school algebra students after school. He had no studio, no following, and no roadmap. He just knew his students needed something better than the textbook.

Over the next decade he recorded 800+ lessons, earned a Silver Play Button, presented his research at conferences in Europe and Asia, trained hundreds of educators, and built a nonprofit to make sure everything stayed free.

When he teaches educators how to teach online, he's not sharing theory. He's sharing the exact system he built and tested in his own classroom for over 20 years.

800+
Free video lessons
16M+
Learners reached
100+
Educator workshops
20+ yrs
Classroom teaching
Free for every educator

Resources you can use this week

No paywalls. No upsells. Just practical tools from a teacher who's been in the room.

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Flipped Classroom Quickstart Guide

A condensed, practical PDF walking you through the first steps of flipping your classroom — even if you've never recorded a video before.

Download free →
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Video Lesson Checklist

30 things to check before you hit record — from lighting and audio to pacing and student prompts. Works for Loom, Zoom, or a full studio setup.

Get the checklist →
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AI Prompts for Lesson Planning

Dr. E's tested ChatGPT and AI prompts for creating lesson outlines, writing discussion questions, and building formative assessments faster.

Get the prompts →
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Flipped Classroom Research

Peer-reviewed evidence that the flipped model works — Dr. E's published studies on student performance, attitudes, and engagement in flipped math classes.

Read the research →
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Flipped Classroom Books

A curated reading list of the best books on flipped learning, online teaching, and educational content creation — with Dr. E's own recommendations.

See the list →
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Weekly Teaching Tips

One practical tip per week — from flipped classroom strategies to video production, AI tools, and online engagement. Free in your inbox.

Join the newsletter →
From educators who've been in the room

What teachers say about Dr. E's approach

I was hesitant to record my first video — it always felt awkward and I cringed watching myself back. Dr. E told me to focus on the students in my classroom and ignore the noise of who else might watch, and that one shift unlocked it. I found a skill I never thought I could do.

Katrinah M.
Katrinah M.
Teacher · Desert Rose Elementary School

Dr. E's flipped classroom model completely changed how I approach math instruction. My students come to class having already watched the concept — and now our class time is spent actually doing math together, not just watching me lecture. The difference in engagement is night and day.

A
Alicia R.
High School Math Teacher · Southern California
📬 Free resources from Dr. E

Get one teaching tip every week — free

Flipped classroom strategies, video production tips, AI tools for teachers, and math resources. Delivered weekly. Totally free. No spam.

Join educators getting free math + teaching resources every week.

Ready to teach differently?

Your students deserve a teacher who shows up with energy.

Whether you want to flip your classroom, record your first video, or bring Dr. E to your school — the next step starts here.