This two-volume collection of diverse international experiences and perspectives on the current use of Horizons in Earth education is a joint effort of fifty-seven authors from sixteen countries. Most of the chapters describe current work of the authors on the use of computers in their respective areas of education. The material of this volume should be of interest to teacher educators in the areas of science, technology, engineering and mathematics (STEM) education involved in the use of computers as teaching tools; tertiary education faculty in STEM areas; curriculum developers; policy makers at different levels; and college students in STEM-related programs.