Jill Tucker:

The drudgery of solving for X flew out the door of a Presidio Middle School classroom Friday as the giddy students traded in their back-breaking algebra textbooks for an iPad touch screen filled with integers and equations that came to life with the flick of a finger.
The San Francisco eighth-graders are among 400 California middle school students participating in a pilot study funded by textbook publisher Houghton Mifflin Harcourt on the use of digital textbooks. The results will help determine whether the high-tech version educates schoolchildren as well or better than its wood-pulp predecessors.
While it’s not hard to imagine classrooms full of such devices in the not-so-distant future, the novelty was not lost on many of the adults in the classroom Friday.
Remember this day, district officials told the students.