This document discusses the four basic skills of language learning: listening, speaking, reading, and writing. It provides information on each skill, including what percentage of language acquisition is attributed to each skill. Listening makes up 45% and is considered a receptive skill, while speaking at 30%, reading at 16%, and writing at 9% are productive skills. The document outlines important strategies for developing each skill and common issues students may face with each one. It emphasizes the importance of practicing all four skills for effective language learning.