**Numberbender** is Dr. Esperanza’s portal for his flipped classroom model which contains videos lectures in algebra, statistics, trigonometry, pre-calculus, and calculus in English and Filipino.

Numberbender.com is a site developed for FREE online math videos for teachers and students and the venue of Dr.E's flipped classrooms. A flipped classroom is one in which students watch and complete online lectures on the subject matter at home, and use their classroom time to work on problem sets with the help of their teacher and classmates.

Dr. Esperanza currently teaches AP Calculus, AP Statistics and other math classes at Barstow High School in California. He is also an adjunct professor at Barstow Community College and Chapman University. A graduate of De La Salle University and Southwestern University, he just completed his doctorate degree in Development Education at Cebu Technological University.

He was awarded the Apple Distinguished Educator for 2015, and was recognized as Barstow Teacher of the Year in the same year. He was also awarded by Kababayan Today as their very first Filipino-American Community Hero in 2015.

Numberbender seeks to provide teachers and students curriculum based math videos to help them in their lesson and homework. Anecdotally, prior to using these videos, Dr. Esperanza had one of his students pass the AP statistics exam and two who passed the AP calculus test; after incorporating the flipped classroom model, he had ten students post passing scores on the AP Statistics exam, as well as an increase in the AP Calculus pass rate.