Engrade is a free online gradebook that allows teachers to manage their classes online as well as post grades, assignments, attendance, and upcoming homework online for students and parents to see.
edublogs.org is a no-profit adventure into providing free WordPress blogs and hosting for teachers, students, researchers and writers who are interested in education.
F. Bauer, M. Franzmann, P. Fuchs, и M. Jung. IAB-Regional. Berichte und Analysen aus dem Regionalen Forschungsnetz. IAB Nordrhein-Westfalen Institut für Arbeitsmarkt- und Berufsforschung, Nürnberg, (2011)43 Seiten.
R. Gunzenhäuser, и E. Haas. utb-studi-e-book UTB GmbH and Barbara Budrich, Stuttgart and Opladen, 3., überarbeitete und aktualisierte Auflage издание, (2015)