ExplorTech began in 2016 after a successful pilot summer program that focused on robotics and coding with Raspberry Pi. Our mission was inspired by the recognition that an individualized, project-based program for small groups of highly motivated elementary and middle-school students could produce mastery of concepts that some might believe impossible. This should not have come as a surprise; Dr. Benjamin Bloom had in 1984 described the two-sigma problem, demonstrating dramatic performance advantages when mentorship and mastery learning are combined. I was simply observing the expected outcome of combining a technology-rich self-paced learning environment with a directed mentorship informed by my experience in research and development for major computer companies. This would become the central premise of our pedagogical direction.