I taught myself for a while before, and the review content was too much and messy. I went to the exam without reading, and the result was unqualified. I also signed up for this teacher qualification class that loves to chew the classroom. So far, it seems ok. The teacher can speak several chapters in each class, which is fast but can keep up. Reading after class is much easier for me, and I feel much better than when I study by myself. The exam is coming soon. Wish me success.