Cell Phones in the Classroom: Digital Distraction or Teaching Tool? Greg Graham is the author of the article "Cell Phones in the Classroom? No, Students Need to Pay Attention." Liz Kolb is a clinical assistant professor at the University of Michigan and authored Cell Phones in the Classroom: A Practical Guide for the K-12 Educator. Lisa Nielsen is an award-winning blogger, longtime public school educator, and author of Teaching Generation Text.