More than 7,000 educators attend the prestigious SU+GSV Summit in San Diego every year to learn about technology breakthroughs in education.  Gavin Cooney was a regular at the event. But last year, as he spoke at the event, the co-founder of Learnosity, an edtech company that began in a garden shed, was particularly fired up as he addressed the gathering.  The Drogheda-born entrepreneur had locked away half a dozen of his best engineers, tasking them with working only on new artificial intelligence ideas. They had come back with five ideas, ranging from a feedback aid that makes grading more efficient…