The students of our calss had a discussion about it.

The students of our calss had a discussion about it.
The students of our calss had a discussion about it.

The students of our calss had a discussion about it.
我们班的同学就这件事展开了一次讨论.（从学生角度）
我们班的学生就这件事展开了一次讨论.（从教师角度）

我们班的同学关于这件事（it指代的）展开了一次讨论！

我们班学生就此进行了讨论。

“我们的学生放学讨论它”行不？？