Cool slide deck: I like the idea of using NLP as an interface to students! You folks were a few years ahead of the deep learning word models, so there was, and

Cool slide deck: I like the idea of using NLP as an interface to students! You folks were a few years ahead of the deep learning word models, so there was, and still is, a lot of promise in this approach. On the status quo, to me it's unbelievable how these large ed-tech companies (McGraw Hill, Pearsons) can sell the same text book, year after year, in subjects that only need refine every few years.