We had a day recently where the students were able to use their cell phone in my math class. I wanted them to use their cell phone as a calculator for a few things we were doing in class. I also had them look up formulas's to help them find the areas of three shapes (Trapezoid, Circle, and a Parallelogram) . About 3/4 of them had their cell phones with them. The beginning of class went fine. Toward the middle of class, I could tell that several were either texting or e-mailing. When this was happening, two different students got behind on our conversation and wanted me to repeat what we just did for them. Those without devices were content early to use a calculator and a textbook to look things up. Halfway through class, those without devices were looking off a device of someone close to them. a few groups sharing a device got side tracked a few times looking at things other than what we were looking at.
Overall, I liked the use of devices. I think the more a teacher uses them, the easier the expectations are for the students to grasp. This was the first time I used devices this year, so my students were not sure what they could and could not do. This will naturally improve the more you make devices part of your classroom.