Atari, Inc. he was being put to the side by Bushnell; Bushnell had left him out of several high-level meetings, assigned him to overseeing the manufacturing process but not the design work, and Dabney discovered Bushnell had patented his video circuit concept without him as an inventor. In March 1973, Dabney formally left Atari, selling his portion of the company for . While Dabney would continue to work for Bushnell on other ventures, including Bushnell's Pizza Time Theater, the predecessor to Chuck E. Cheese's, he had a falling out with Bushnell and ultimately left the video game industry. Dabney's contributions towards Atari's
Nolan Bushnell take any body of knowledge from English language arts to foreign language, geography, multiplication table or chemistry tables, to parts of the human body and gamify the experience. BrainRush calls their underlying technology "Adaptive Practice." They have also developed an open-authoring system allowing users to quickly create games in different topic areas. Between 2010 and 2012, BrainRush ran a test in Spanish language vocabulary learning with over 2200 teachers and 80,000 students across the country and got an increase in learning speed of between 8–10 times traditional learning. BrainRush rolled out the full platform in the Fall of 2013. Bushnell