If you want to improve your comprehensive ability, you must see how they teach. I have been attending ef children's class for more than 2 years. I found that apart from being more professional in English, they pay more attention to the building of children's self-confidence, which will encourage them to speak out more bravely. Moreover, they often have many activities, such as summer camp, which can also improve their hands-on ability and communication ability. I still like it. Details can be found on their website.