The following instructions will help you when registering for your classes online using Web for Students.
Enter your Clark Account username and password. Click Login
Once logged in, select "Main Menu" under the CU Web quicklinks found along the left side of any ClarkYOU page
Select Registrar's Office, Student Account and Financial Aid
Select Add/Drop Classes
Select the term you are registering for and hit Submit
Enter your six-digit advisement PIN number to access the Add/Drop Classes screen.
When registering for the first time, a blank registration form will appear.
After that, when adding/dropping classes, you will see your Current Schedule on top and the Add Classes area below.
To view Course Offerings, click that link at the BOTTOM of the page.

In this example two CRNs have been entered
Use the Add Classes section of this screen to add other CRNs. Click Submit Changes to register.
To drop classes, view your Current Schedule. Use the drop-down arrow in the Action field next
to the class you want to remove from your schedule. Choose Drop Course on Web and
then click Submit Changes. When your Current Schedule reappears, the course you dropped
should no longer be there.Classes for which you have NOT been successfully registered will appear under the Registration Errors section as seen in Add/Drop Classes. You must scroll to the right to view the Status column of that table to determine the reason for the error.
Some of the most common errors are listed here:
| STATUS MESSAGE | ACTION REQUIRED |
|---|---|
| Closed Section | Course capacity has been reached. Select another class. |
| Linked Course Required | Course requires a lab and/or discussion. Check the course offerings for the required section and add the class again with the required lab/discussion CRN. |
| Prerequisite and Test Score Error | One or more prerequisites, corequisites, or placement level information are not in the database. Select another class. |
| Instructor Signature | Obtain instructor's permission or select another class. |
| Time Conflict with CRN | Conflict in scheduling. Select another class. |
| Class Restriction | Enrollment based on class year (e.g., JR/SR only). Select another class. |
| Invalid Level for Course | Restricted to either undergraduate or graduate students only. Select another class. |
| Duplicate CRN | CRN has been entered twice. |
| CRN Does Not Exist | Incorrect CRN. Check course offerings to verify CRN and re-enter. |
| Maximum Hours Exceeded | Undergraduates maximum of 4.50 units; graduate students maximum of 6.000 units. You must drop a course first before adding another to your schedule. |
You may search the schedule to determine class availability and register for a class directly from the results window.
Below the Add Classes section, click the Class Search Button.
In the Class Search dialog box, enter the chosen parameters for your search. For example, you could search
for all Art History classes that meet on M/W/F. 
When you have successfully registered for all of your classes and lab/discussion sections, you may print your schedule.



To make changes to your schedule online after you have already registered, go to the Add/Drop Classes section. If you have already registered for your maximum number of units, you must drop a course before you can add another to your schedule. Make sure to click on Submit Changes to process. Check the Current Schedule section to be sure your changes were successfully processed. All class restrictions, enrollment cap, etc., are in effect during schedule revision.
Much of the online registration process is the same as for undergraduate students (as explained previously), but there are a few special distinctions you should be aware of.

The Change Course Options dialog box appears. The default Credit Hours appears in the Credit Hours box.
To change the number of units, click in the Credit Hours box and enter the appropriate number of units.
Click Submit Changes.