Basically, children aged 2-3 can learn official documents. There are three subjects: Chinese, English and math. Mathematics begins with grasping the stroke line, and then begins with the sequence, which is addition. Chinese begins with pinyin, while English begins with words. It is suggested to draw a line in mathematics first. Both Chinese and English are equipped with CDs, which can be listened to, spoken and written.

Taobao search "Shen Rong official document mathematics" can find information about official document mathematics, which is colorful and has good teaching materials, which are left over when the classroom is opened. Try it if necessary, just like in class.