Time + 放学 + 了
放学 (fàngxué) means 'to finish school' or 'school is over.' It is commonly used to describe the end of the school day. It often appears with a time expression to indicate when school lets out, as in 六点放学了 (school ends at six).
孩子们放学了,校门口好多家长。
Háizimen fàngxué le, xiào ménkǒu hǎo duō jiāzhǎng.
The kids are out of school — there are so many parents at the school gate.
你们几点放学?
Nǐmen jǐ diǎn fàngxué?
What time do you get out of school?
放学以后我想去打篮球。
Fàngxué yǐhòu wǒ xiǎng qù dǎ lánqiú.
After school I want to go play basketball.