Usages of shàng
在 中文 课 上， 老师 让 我们 自由 说 中文， 表达 自己 的 意见。zài zhōngwén kè shàng, lǎoshī ràng wǒmen zìyóu shuō zhōngwén, biǎodá zìjǐ de yìjiàn.
In Chinese class, the teacher lets us speak freely in Chinese and express our own opinions.
老师 让 我们 回家 读 一些 文章， 然后 在 课上 自由 讨论。lǎoshī ràng wǒmen huíjiā dú yìxiē wénzhāng, ránhòu zài kèshàng zìyóu tǎolùn.
The teacher asked us to go home and read some articles, then freely discuss them in class.
Elon.io is an online learning platform
We have an entire course teaching Chinese grammar and vocabulary.