The small steps of online institutions are more reliable than the early education institutions of offline entities. First of all, you don't need to go out, you can study at home, according to your own time, you don't have to deliberately fix the time; Secondly, the small step avoids several children studying together in the physics early education class. Every child's performance is different, and the teacher's focus will naturally be different. Especially during this year's epidemic, it is better to study at home in small steps.