In the course builder, turn on Written answer, graded by a manager for a question, and add what to look for. Only managers see that note.
Grading
Handed-in answers appear under Exams → To grade. Mark each written answer, add a message if you like, and choose Send grade. The score combines automatic and written questions. If it reaches the pass mark, the person passes and gets their certificate.
Replying
Choose Reply without grading to ask a question or give a pointer. The answer stays in your list.
When there are a lot
Answers come one at a time, oldest first, and you can filter by course or find a person. Skip any you want to come back to. Multiple-choice questions mark themselves, so use written questions only where they're worth a person's time. With Crew, each line manager sees their own team's answers.
Notifications
People see grades and replies in My learning, and the bot sends them a direct message.