The following sources and material were used to programme the exercises:

  • English Vocabulary in Use by Michael McCarthy and Felicity O'Dell, Cambridge University Press 1994
  • English Grammar in Use by Raymond Murphy, sixth edition, Cambridge University Press 1995
  • English Grammar in Use - Supplementary Exercises by Louise Hashemi, Cambridge University Press 1995
  • Using Essential English Tenses by Munro Mackenzie, Evan Brothers Ltd. 1972
  • Jacob, Rainer: Englisch - Grammatikübung. Starkverlag, Freising 1994.
  • Jacob, Rainer: Englisch - Wortschatzübung. Starkverlag, Freising 1993.
  • Ungerer, Friedrich: Learning English - Grundgrammatik. Stuttgart 1998.
  • Hot Potato - software version 3.0/4.0/6.0
  • MS Front Page 2000