During the summer vacation, you can go to a summer camp in Britain or the United States, so that he can have such a foreign world, which is convenient for better integration.

Usually take him to watch English movies, and let him sing English songs if he likes music. . A sense of language is very important.

As for English study, you should give him rewards and encouragement. For example, if you score 10 more than the last exam, I will ... (reward)

Give him more encouragement. Let him learn better and learn more English. Let him recite five words a day. Give him a week ... a month. ...

Math:

If the child is not interested in mathematics, I dare say there must be something wrong with the child. For example, he didn't understand what the teacher said at school one day and didn't want to ask the teacher. In this way, if you lose confidence in mathematics, you will naturally lose interest. Give him some topics that he is good at first, and let him rebuild his confidence. Let him refuel. Give him some higher-level topics. If he succeeds, you can encourage him again. For example, you don't have to take an Olympic class ... (give him some rewards as appropriate)

This is the way I teach my children. I hope you can learn something from it.