This book is very important because it will help and show you step by step all the lessons of the center that is (Practical School for Language and Science Learners PSLS in short) with its details and to facilitate students and other people who want to learn English in a PSLS way to learn well and improve too quick English in a short. This book is the answer to some misunderstanding of people who think you must have some basic knowledge or English lessons for learning.