When creating an assignment, teachers have the following options for the behavior of explanations in the assignment:
After each question (least restrictive):
Show the answer and explanation as students answer questions.
The sooner the students receive feedback the better - this option allows students to immediately apply the feedback to the next question.
After assignment completion (moderately restrictive):
Hide answers and explanations until after the entire assignment is complete.
You might use this option when you want students to be aware of their pacing while practicing.
After due date has passed (most restrictive):
Hide answers and explanations until after the due date passes.
This is a good option when more than one class is completing the assignment or you are using a take-home assignment for a grade.
[Pro-tip]: If you would like to withhold the answers from students permanently, adjust the assignment due date to be after the semester or the school year ends.