In the settings for Assignments and Assessments, teachers can now control when students can review their submissions and what they can see. Please note that students MUST submit their activity before they are able to review it
Allow students to review
This controls the students' ability to go back in and review their submission. This is the lowest level of access, and lets them see only what they submitted with no additional information.
Show correct/incorrect marks
Once the students are able to review their work, this additional setting will flag which of their responses were correct or incorrect.
Reveal answers
When reviewing their incorrect responses, this will display to the student what the correct answer should have been.
For full manual control of when correct answers are released, it is recommended to leave all settings as "Never". When you are ready to reveal the answers, you can change this to "After first submission". It is still a requirement that students must have submitted something in order to have something to review.