Teachers are incorporating mobile technology and a digital sensibility into classroom lessons with assignments such as this one: to caption a historical photograph for teacher Nicholas Ferroni's high school history class in Union, N.J. Courtesy of Nicholas Ferroni hide caption

itoggle caption Courtesy of Nicholas Ferroni

Dale Irby in 1973 (left) when his streak began, and in 2012, when the last of his 40 wonderful school photos was taken. Courtesy of Dale Irby and The Dallas Morning News hide caption

itoggle caption Courtesy of Dale Irby and The Dallas Morning News

Teachers and librarians demonstrate against thousands of proposed job cuts in the Los Angeles Unified School District Tuesday. Reed Saxon/AP hide caption

itoggle caption Reed Saxon/AP