Cyber­Men­tor was found­ed in 2005 and is Germany’s largest online men­tor­ing pro­gram for girls in STEM. Up to 800 pupils from 5th to 12th grade are accom­pa­nied by a per­son­al men­tor for one year. The female men­tor serves as a role mod­el for STEM activ­i­ties and pro­vides guid­ance on the choice of sub­jects and stud­ies. Men­tor­ing is pro­vid­ed via a pro­tect­ed online plat­form with mail, chat and forum, and is sup­port­ed by a wide range of infor­ma­tion on STEM, stud­ies, and pro­fes­sion­al choice. The suc­cess rate of Cyber­Men­tor speaks for itself: 71% of inter­viewed par­tic­i­pants choose a STEM sub­ject as a sub­ject or a course of study.