There are correlations between in-school and out-of-school mobile device use for learning. Frequent users tend to have support networks that help them learn to use their devices. For teachers to effectively integrate devices in the classroom, they need training on the devices' capabilities and how they can enhance learning. The educational impact of student device use is limited if teachers do not also use devices. Teacher approval of autonomous device use in lessons affects student use and attitudes. Developing effective mobile learning practices takes time as teachers learn to use devices to support learning rather than as just tools.