Flipped Classroom Model: Effects on Performance, Attitudes and Perceptions in High School Algebra
11th European Conference on Technology Enhanced Learning (EC-TEL 2016), Lyon
The story behind Numberbender
It started in 2012 with a flipped-classroom experiment for Dr. E's algebra students at Barstow High School. After one week, the impact was clear — so he kept going. He recorded full courses in algebra, precalculus, calculus, and statistics, then recorded each one a second time in Filipino so his students who struggled in English had a path home.
At the time, he was the first Filipino math teacher uploading curriculum-based lessons in Filipino. When the pandemic hit, those videos quietly served not just his students in California — but classrooms across the Philippines.
What drives the work
What started as one teacher trying to help his own students has grown into a body of work that reaches learners and educators worldwide — through published research, a YouTube Silver Play Button, teaching awards, conference keynotes, faculty development workshops, and now a full-time college professorship.
Numberbender Inc. is a registered 501(c)(3) nonprofit, so every course, every video, and every workshop exists to serve students and teachers — not shareholders. The mission keeps growing, and there's nothing stopping it now.