Abstract. The article covers the concept of deep practice (deliberate practice, error-focused practice) which is increasingly widely used in teaching different disciplines. The author pays particular attention to its main characteristics, rules and the possibilities of its application in the sphere of learning foreign languages. Supported by current research the article shows that errors and difficulties in trying to master a second language are not only unavoidable, but even necessary for further better performance.
Key words and phrases: глубокая практика, настойчивая практика, нацеленная практика, практика, основанная на ошибках, зона наилучшего восприятия, изучение иностранных языков, необходимые трудности, deep practice, deliberate practice, targeted practice, error-focused practice, sweet spot, learning foreign languages, desirable difficulties