Concrete uses for artificial intelligence (A.I.) continue to multiply as the technology improves. Earlier this week EdTech reported that Gradescope has raised 2.6 million from investors. The firm, started as a side project at U.C. Berkeley in 2012, makes software that helps STEM professors grade exam questions on handwritten tests. The company currently operates on a "freemium" model -- grading simple exam questions is free, while the A.I. feature (which is still a few months away) will be available for a price. "We want a feature that will offer the convenience of a Scantron without watering down the questions," said cofounder Arjun Singh.