ESL is a world-class authoritative English course for language learners whose native language is not English and who use English as a second language. By studying ESL, students can not only improve their English language proficiency, but also have a deeper understanding of the social structure and cultural environment of Western countries. The textbooks are based on the syllabus of Canadian public schools, focusing on the ability to use English language. It enables non-native English students to reach the same level of Canadian high school students in terms of English listening, speaking, reading, and writing skills.