但是他的学习速度突飞猛进，现在已经学到初三数学了。

But he was mastering the subject so quickly he had already moved onto 9th grade math.

youdao

我曾连续5年参与暑期辅导班的教学，主要辅导初三，高二，高三数学。

I have been involved in 5 consecutive years of teaching summer classes, mainly junior high guidance, high School, Senior high School.

youdao