How Silicon Valley plans to conquer the classroom

Silicon Valley is going all out to own America's school computer-and-software market

They call it the “Church Lane Hug.”

That is how educators at Church Lane Elementary Technology, a public school here, describe the protective two-armed way they teach students to carry their school-issued laptops.

Administrators at Baltimore County Public Schools, the 25th-largest public school system in the United States, have embraced the laptops as well, as part of one of the nation’s most ambitious classroom technology makeovers. In 2014, the district committed more than $200 million for HP laptops, and it is spending millions of dollars on math, science and language software. Its vendors visit classrooms. Some schoolchildren have been featured in tech-company