Artificial intelligence, especially methods of natural language process-ing, can be used in educational con-texts in order to support the teaching process. In this article, we focus on three main application types that we are currently working on: we automatically generate exercises for various question types that are hard or tedious to formulate for humans, and assess the difficulty of exercises we created. We automatically score learner answers, be it answers to short answer questions, which are scored based on their content, or longer essays, scored based on lan-guage use and argumentation quality. Finally we give learners feedbackabout their texts, for example by analyzing the spelling errors pro-duced by school children in order to inform them about the orthographic phenomena they still struggle with.