Write an article based on this summary:

Ask for time off from work or school. Reduce your workload. Return to your normal activities.
Depending on the severity of the concussion, your doctor may prescribe a few days to a few weeks off from work or school as a part of your recovery process. Let your boss and/or teachers know that you have had a concussion and that your doctor has prescribed you time off. Give them a note from your doctor as proof of the diagnosis and prescription. Ask your doctor how you can help your boss understand what has happened. If you are in school, work with your teachers to see how you can make up any missed class time once you are better, whether it is through extra work or summer school. Use your vacation or sick time if you need to. In some cases, you may need to provide a medical leave letter to your employer in order to take time off. Once your doctor gives you the green light to go back to work or school, avoid picking up where you left off. Ask your boss if they can reassign your most physically or mentally challenging projects to someone else. Alternatively, see if it is ok if you only work half-days until you are fully recovered. If you are in school, ask your teacher if they can reduce your homework load. You may need to have a reduced workload for a few days to a week, depending on the severity of your concussion. Once your symptoms disappear, your doctor will assess the progression of your recovery. If you have fully recovered, then it is ok to return to your normal work and school activities. If your symptoms come back after returning to your normal activities, make sure to contact your doctor. The time it takes for a full recovery depends on the severity of the concussion, as well as how soon you were treated after sustaining the concussion. If you sustained a mild to moderate concussion, it may take 1 to 2 weeks to recover. If your concussion is more severe, it may take 3 weeks to a month to fully recover. If you were treated later rather than sooner, it may take you 1 to 2 extra weeks to recover.