This study aims to research how long students spend their learning time on five English skills, grammar and vocabulary, reading, listening, speaking, and writing in class and outside of class, and how to improve teachers’ lesson plans and students’ learning abilities regarding the five skills. After finishing English courses, a total of 119 first-year high school students answered the questionnaire. The students then were divided into three groups of beginner, intermediate and advanced levels, and it was found that the beginner and intermediate level students spent most of their time on grammar and vocabulary followed closely by reading both in class and outside class. Only advanced level students in class spent more time on reading than grammar and vocabulary. It was concluded that teachers need to set more opportunities for students to practice the other skills, especially listening and speaking.