Lower Merion School District employees activated the web cameras and tracking software on laptops they gave to high school students about 80 times in the past two school years, snapping nearly 56,000 images that included photos of students, pictures inside their homes and copies of the programs or files running on their screens, district investigators have concluded. In most of the cases, technicians turned on the system after a student or staffer reported a laptop missing and turned it off when the machine was found, the investigators determined. But in at least five instances, school employees let the Web cams...