When you're a rural student, the ride to school can easily take an hour or two. That's a lot of lost time that could be better spent doing homework or studying for tests. Google, however, is determined to put that lengthy commute to good use: it's formally launching Rolling Study Halls, or school buses equipped with WiFi, computers and on-bus educators to help rural students with work beyond school hours. The official program will expand on two pilots in the Carolinas to include 16 extra school districts, starting now with the Deer Trail district in Colorado. If all goes well, Google will have reclaimed about 1.5 million hours for "thousands" of students by the end of the school year.