Calvert Education Services quietly merged with Vschoolz this week. The details of the deal are undisclosed, but the partnership positions Calvert Education to expand its current K-8 offerings through high school and to offer a wider range of electives. Calvert is steeped in a long tradition of distance learning; Calvert students completed correspondence courses via horseback as far back as 1906. The program has a century of experience working with home school students and partnering with districts to provide online and blending learning courses. The original non-profit brick-and-mortar Calvert School maintained a small interest in Calvert Education Services when Camden Partners became a majority owner in early 2013.