The little black devices, the shape and size of small cellphones, have begun to appear in hundreds of Washington area classrooms. Hanging from the necks of elementary school teachers in Alexandria and kindergarten and first-grade teachers in Prince George's County, they might herald the most sign... -
New Microphones Are Bringing Crystal-Clear Changes
The little black devices, the shape and size of small cellphones, have begun to appear in hundreds of Washington area classrooms. Hanging from the necks of elementary school teachers in Alexandria and kindergarten and first-grade teachers in Prince George's County, they might herald the most sign...-
By Jay Mathews