Feedback is an important part of language learning and can take various forms depending on context. It can be formative, given continuously during learning to help students, or summative, typically through scores at the end of a period of study. Effective feedback aims to improve student learning and is often categorized to focus on errors that interfere with comprehension, are frequent, offensive, or related to areas recently studied. Guidelines for feedback include varying degrees of directness, from implying an error to explicitly providing corrections. When giving feedback, teachers should praise effort not talent, make mistakes positive learning opportunities, be specific, explain suggestions, set clear goals, and keep feedback timely.