Numberbender
✍️ Articles by Dr. Peter Esperanza

Real Talk on
Teaching Online.

No fluff. No theory without practice. Just honest reflections from a math professor who has been flipping classrooms, recording videos, and teaching across 10+ countries since 2012.

🔄 Flipped Classroom 🎬 EduTuber Tips 📐 Math Education 💻 Online Teaching 🧑‍🏫 Teacher Growth
Featured Post
How I Flipped My First Math Class
Flipped Classroom

How I Flipped My First Math Class — And What Almost Made Me Quit

2009. A Canon camera. A bar stool in Room 30. And 30 minutes of staring at the lens with nothing coming out of my mouth. The honest story of how I almost gave up on flipping — and the one Google search that saved my career. Includes the awkward first-take video.

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All Articles · New post every month
From the Classroom to the Camera

A new article on flipping, teaching, and EduTubing — published the first or second week of every month. Next post: June 2026.

5 Flipped Classroom Mistakes I Made
Flipped Classroom
5 Flipped Classroom Mistakes I Made (So You Don't Have To)
The 5 lies I believed in year one of flipping my math class — including the one that almost made me quit. (Plus a behind-the-scenes video proving even ADEs get head-butted by their own whiteboard.)
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How to Become an EduTuber
EduTuber
How to Become an EduTuber: What I Wish I Knew Before Starting YouTube
From 9 monthly views to 340K+ subscribers. The 8 lessons I wish someone slid across the table to me before I clicked PUBLIC. (Includes the video of Google flying me from Barstow to Manila for my first YouTube event.)
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The 5-Minute Rule for Teaching Videos
Flipped Classroom
The 5-Minute Rule: Why Your Teaching Videos Should Never Be Longer
I tried recording my full 50-minute classroom lesson with no cuts. Nobody watched it. Here's why 5 minutes wins — and how I prep one in 10. (Includes my whole MacBook + Home Depot whiteboard rig on video.)
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📐
COMING SOON
Math Education
Teaching Math Online vs. In Person: What Actually Works
✏️ Placeholder — Dr. E will write from personal experience
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COMING SOON
EduTuber
How I Got 16 Million Views Teaching Math (Without Being a Celebrity)
✏️ Placeholder — Dr. E will write from personal experience
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COMING SOON
Research
The Truth About Flipped Classroom Research: What the Studies Actually Say
✏️ Placeholder — Dr. E will write from personal experience
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COMING SOON
EduTuber
How to Set Up Your First Teaching Video in One Day (No Fancy Gear Needed)
✏️ Placeholder — Dr. E will write from personal experience
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COMING SOON
Online Teaching
What Is a Flipped Classroom? A Real Teacher's Answer (Not a Textbook's)
✏️ Placeholder — Dr. E will write from personal experience
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COMING SOON
Online Teaching
Why Filipino Educators Are Quietly Leading the Global EdTech Movement
✏️ Placeholder — Dr. E will write from personal experience

🇵🇭 Philippine schools open in June! Get FREE bilingual math worksheets: