Ms. Stiller, born 1980, holds a diploma in biology and obtained her degree in December 2008. Since October 2004 she also studies psychology at Bielefeld University. Alongside her studies she worked as a student assistant at the chemistry Teutolab at Bielefeld University and as a substitute teacher for chemistry at a secondary school (Gymnasium) in Bielefeld. From October 2009 to September 2010 she was on maternity leave. In October 2010 she started a PhD (“Testing the basic course in natural sciences at the sixth form college (Oberstufenkolleg) in Bielefeld on the basis of cognitive and effective perspectives). From October 2010 until February 2011she worked as an academic assistant on the BiSEd-project “Development of concepts for the preparatory seminar of the internship and for the internship in context of the BiSEd-project in cooperation with the sixth form college (Oberstufenkolleg)”. Since March 2011 she works as an academic assistant at the scientific department of the sixth form college (Oberstufenkolleg).