Teacher stress and burnout have emerged over the past 20 years as a serious concern for teachers, students and parents. This study tested the hypothesis that teachers who participate in aerobic exercise and have increased parent involvement in...
In this paper Euclidean and hyperbolic discontinuous isometries* are discussed and compared. The graphic artist M.C. Escher (1898-1972) produced works which have for the structure points, lines, and angles, which repeat in the plane (Euclidean and...
