Registration and CODO Info

Once Batch Schedules Post

Batch registration schedules will be available for viewing:

• By 5 PM Eastern time 12-4-25 on for Fall-to-Spring advising appointments

• By 5 PM Eastern time on TBD for Spring-to-Fall advising appointments

• Summer and Winter terms have no batch process; everything is done within Open Registration.

Due to the random nature of batch registration, your schedule may not exactly match your Course Request Form (CRF).
This is normal and not cause for concern because:

• True registration emergencies are rare.

• You’ll have ample time to adjust your schedule before the semester starts.

• Many students will make changes next week potentially opening up space.

• You still have many semesters to take any missed courses.

If there is a course you are missing, your best option will be to look for space in the course during open registration. You can look for seats:

• Manually using Scheduling Assistant

• Using a seat-tracker such as Coursicle

To modify your schedule during open registration:

1. Find your time ticket on your student profile. This tells you when next week you can begin to make changes.

2. In myPurdue, navigate to the "Register for Classes" card and select "Scheduling Assistant."

• Do NOT select "Course Request Form" as that is only used during batch registration.

3. Select the appropriate term (PWL) for your term if prompted.

• Do NOT select (PIN); this is for Purdue Indianapolis!

4. Enter your PIN number from your ACRF.

5. Make changes to your schedule as needed. Links to various tasks are below:

• Add a Class

• Drop a Class

• Waitlist a Course

• Request an Override

• Swap Sections

• Swap with a Waitlist Request

More information can be found below. To summarize (in case you don't want to read further):

• All changes are space permitting: no space = no change.

• I can't get you into or take you out of classes.

• You may have to wait one (or more) semesters before you can take a class (e.g. MA 261/calc 3, EAPS 111/112, foreign language, etc.).

• When modifying your schedule, LOCK all courses you want to keep or you are liable to lose them.

• Professors do NOT control space in classes, so don't email them asking for it.

Open Registration Tips

Some tips regarding open registration. Please keep the following in mind:

Academic advisors CANNOT "get you into" or "take you out of" classes: we are NOT high school guidance counselors. 

Adding/dropping classes and being aware of degree requirements is ultimately YOUR RESPONSIBILITY!!

Time Tickets: When You Can Change Your Schedule

Your schedule can be changed when your time ticket opens. For Fall 2025 registration, these will open throughout the week of 7-28-25.

How to Find Your Time Ticket

Your time ticket is in your student profile (accessed through myPurdue) under "Registration Notices." It will look something like the image below:

How to Read Your Time Ticket

Using the ticket above as an example, the student can register starting from 2:30 PM on 12-2-2024. Your actual time will vary based on your class standing as well as what semester we are entering (seniors have highest priority).

PIN Numbers

Your PIN was released to you during your registration or All Aboard Purdue appointment (if you had one). It should be visible on your time ticket and ACRF.
If not, it is posted as a backup in one of several places:

1. In the "Notes" column with a label like "Fall 2025 ACRF/PIN."

2. In the "Appointment Reports" summary I wrote from your appointment.

3. In your All Aboard Purdue follow-up email as part of the ACRF attachment.

If you didn't meet with me during pre-registration or All Aboard Purdue, you won't get your PIN and be able to register for classes until you do.

Changing Your Schedule

To change your schedule, you must first clear all holds. For more on holds, click here. Once this is done, follow the instructions below:

1. LOCK any/all courses that you do NOT want to change. Click the lock icon next to the course.

• If you do not lock classes, UniTime may change the sections of some/all classes, or worse, drop you from a course entirely.

2. In general, it is best to add a class BEFORE dropping one. You CAN be below 12 credits during open registration.

3.  If you want to add a class, see video for how to add a class.

4. If you want to drop a class, see video for how to drop a class.

5. If you want to swap sections, see video for how to swap sections.

6. It is best practice to perform one request at a time AND to wait 2 (two) minutes between requests.

7. Make sure to pay attention to the Office of the Registrar calendar.

Restricted Courses

CS courses, upper-division MGMT/ECON/OBHR classes, and others are often restricted to declared majors in those disciplines. You will likely need to wait until a certain deadline passes to add those courses.

Full Courses

If a course is full, it is possible that space will change throughout open registration. This is especially true once semester grades post! Some full classes will offer waitlists; the following guidelines will be helpful:

• Clicking the magnifying glass icon in Scheduling Assistant will tell you if a class is running a waitlist. This will be in the "WL/Override" column.

• This video shows how to waitlist a class.

• If a course is NOT running a waitlist, it will be listed as "CLOS" (closed) OR there will be no information about a WL/Override. Your only option here is to wait for space to open.

Do NOT email professors asking for space in the class - they do NOT control this!

Research Classes; Changing to Pass/No Pass

If you want to add research classes after you have spoken with faculty members and confirmed that you are able to join their research, this video will show you how to add research courses.

During open registration, you can add research courses and change grade mode (from graded to pass/no pass; from regular grade mode to honors, etc.). Remember that degree requirements (e.g. MA 16100, STAT 35000, etc.) cannot be taken as pass/no pass!

CODO Requirements

Want to view CODO  requirements to math/statistics majors/physics but need the links to the requirements based on your catalog year? Look no further!
(This page will update with more catalog years as they become available.)

For the  MASA honors majors (ASHO, MAHO, STHO), one must first CODO to the non-honors major (ACSC, MATH, STMA) and then CODO to the honors version.

For the PHYS honors majors (PHHO, APHO), one must first CODO to the non-honors major and also be done with the physics core (172H, 272H, 344, 306, 307, 360).

Legend: ACSC = actuarial science; ASHO = actuarial science honors; MATH = core math; MAHO = core math honors; MAED = math education; APMA = applied math

MABU = math/business; MASI = math-statistics; STAP = applied stats; STHO = stat honors; STMA = stat w/math emphasis; PHYS = physics; APPH = applied physics;

PHHO = physics honors; APHO = applied physics honors

The links were originally pulled from here: https://www.purdue.edu/advisors/codo/ (this includes back to the 2017-2018 catalog term).

Note that you can get to the actual catalog pages for the major in question directly from the CODO page without having to re-navigate the catalog in its entirety.