There is fear that adolescents have limited control over their digital technology use. The current research examines longitudinal (Study 1) and daily (Study 2) associations between U.S. adolescents' self-control and digital technological impairment and use. Using a large sample (N = 2,104; Wave 1: M[subscript age] = 12.36, 52% female, 57%…

The Education system in Germany recently invested five billion euro in digital infrastructure for about 40 000 schools. Therefore, this mixed-method study explored the relationship between integrating educational technology in mathematics education and the mathematics achievement of Grade 4 German students. Descriptive statistics and two-level…