The series of books taught in the CEL and DEL programs at Kardan University is by Macmillan called Skillful. Skillful Second Edition is a 5-level academic English course designed for students who want to learn the language from the basic up to advanced level. The Foundation Books of the series is taught in the CEL program at Kardan University. Its rigorous step-by-step approach develops language proficiency and academic skills, helping students perform at their best. The books engage and challenge students with exciting and relevant topics, using fresh, dynamic content and meaningful academic tasks. The material encourages learners to study and analyze a wide range of ideas and problems to form and express their opinions with the confidence needed to achieve academic success.