For the extension, you must fulfil the requirements for the initial issue of the residence permit:

• Study at a
  • state university or
  • state-recognised higher education institution (university, teacher training college, art college, university of applied sciences) or
  • comparable educational institution (e.g. Baden-Württemberg Cooperative State University)
• Studies as the main purpose of the stay
  This includes all training phases:
  • Language course or preparatory college to prepare for studies
  • Language examination
  • internships in preparation for the degree programme (if recommended or required by the university)
  • Studies (basic studies, main studies, study-related internships, intermediate and final examinations)
  • Postgraduate, additional, supplementary studies or doctorate
  • practical activities following a degree programme (if they are a prescribed part of the training)
• Your living expenses (assessment limit is the maximum funding rate according to the Federal Training Assistance Act (BAföG)) and health insurance in Germany are guaranteed.
• You fulfil the requirements for admission to the desired educational institution.
  You cannot fulfil the necessary general school requirements in Germany.

In addition

• you may not unreasonably delay your studies and
• you must be able to complete your studies within a reasonable period of time.
  The reasonableness of the time depends on the purpose of your stay and your personal circumstances as well as your endeavours to achieve the aim of your stay within a reasonable period of time.
  The usual length of stay, interim examinations and performance reviews are all points of reference. In principle, it can be assumed that exceeding the average duration of studies by up to 3 semesters constitutes completion of the degree programme within a reasonable period of time.
  If you require a longer period of time to complete your studies, you should contact the Foreigners' Registration Office.