The thesis focuses on the issue of corrective feedback in speaking.The theoretical part aims to find ouf what types and techniques of corrective feedback are used in speaking. This part also deals with speaking as one of the skills in learning a foreign language and mistakes that appear there. The topic has been set into a non-formal educational background. The practical part aims to find out what forms of corrective feedback are provided to different types of speaking mistakes made by adult students in a language school. The research has been based on observation of recorded online lessons.