We would have classes or workshops or lessons, but there would be no official grading.

我们会有课程、研讨会或者教学，但不会有正式的评分。

youdao

But I don't speak Greek, so I'll go to evening classes and have Greek lessons for a month before I go.

可是我不会讲希腊语，所以去雅典前刻名先去夜校进修一个月的希腊语课程。

youdao

We have four classes (lessons) in the morning.

上午我们有四节课。

youdao

These teachers volunteered to have their classes videotaped and their lessons scored by experts, to have their students evaluate their teaching, to fill out surveys about the support they receive and to be assessed on their content knowledge.

WSJ: Bill and Melinda Gates on Teacher Evaluation