Betsy Morris and Tawnell D. Hobbs:

When Baltimore County, Md., public schools began going digital five years ago, textbooks disappeared from classrooms and paper and pencils were no longer encouraged. All students from kindergarten to 12th grade would eventually get a laptop, helping the district reach the “one-to-one” ratio of one for each child that has become coveted around the country. Teaching apps and digital courses took the place of flashcards and notebooks.

Despite the investment, academic results have mostly slipped in the district of about 115,000 students.

Over the last decade, American schools embraced technology, spending millions of dollars on devices and apps, believing its disruptive power would help many children learn faster, stay in school and be more prepared for a competitive economy. Now many parents and teachers are starting to wonder if all the disruption was a good idea.