This is the second course I am taking with Chika sensei. The N3 All-in-one course is a comprehensive collections of material, not only it includes N3 materials but also reviews of N4/N5 as well. Grammar lessons are short but informative and doing homework after each lesson is a must. Chika sensei always checks homework and give feedback within the next day so it is helpful to keep up with her as well. Kanji, reading and listening are well organized. Highly recommended anyone who is serious about learning and passing the JLPT.