Written tests are an interesting part of the assessment of the students’ knowledge and communicative competences.
A friend of mine composed tests easy to grade (or mark). He just assigned and wrote some grade to each activity, and after the exam, on another day, the correct answers were written on the chalkboard.
The students had their test papers with them, after the grading by the teacher.
He asked his students for correct answers and responses, and wrote them on the blackboard. Often there were several different possible answers and replies. Then the students could correct their tests themselves. They could keep their tests.
Often too, he used to write a comment in English to each student on the test, at the end – often but not to every test. / Photo from: www interactiva-deutsch-stuttgart de