Introducing the Triton Student System
UC San Diego is upgrading to the Triton Student System (TSS), a new student information system for Extended Studies.
What is the Triton Student System?
UC San Diego is upgrading to a new student system called the Triton Student System (TSS). Starting with Fall 2026 enrollment, Extended Studies students will use TSS to find and book courses, manage their student account, and access their records.
This page will be updated as more information becomes available.
This page will be updated as more information becomes available.
What's Changing
New Student Portal
MyExtension will be replaced by the Triton Student System (TSS). In TSS, you’ll find and update your personal information, view your schedule, grades, and student record, and manage course enrollment in one place.
Unified Account
Extended Studies is joining the same student system as the rest of campus. If you study through both Extended Studies and the general campus, or are a UC San Diego alum, you will have one account, not two.
New Student ID
Your current student ID (PID) is being replaced by a Triton Student Number (TSN). Many students will receive their TSN by email. If you have one, save it — you'll need it to claim your account. (The last four digits of your Social Security number also work.) If you don't have a TSN, don't worry. One will be created for you when you book a course.
Terminology changes
TSS uses updated terms for enrollment. Enrolling is called “booking,” and a course section is called an “event.” You may see these terms used throughout the system.
Frequently Asked Questions
All Extended Studies students will have a basic profile in TSS. If you have taken an Extended Studies course in the past 10 years, your academic information will carry over automatically and you will receive your Triton Student Number (TSN) in early August. Please log in to TSS when it becomes available and check to be sure your information is accurate.
If it has been more than 10 years since your last Extended Studies course, you will be prompted to fill in some basic information the first time you book a course. Your information will be reviewed to determine whether an existing account is on file. If one exists, you will be prompted to set up your login. If not, an account will be created for you once payment is received.
If it has been more than 10 years since your last Extended Studies course, you will be prompted to fill in some basic information the first time you book a course. Your information will be reviewed to determine whether an existing account is on file. If one exists, you will be prompted to set up your login. If not, an account will be created for you once payment is received.
MyExtension will remain available for reference until October 13, 2026. Starting in August 2026, TSS is where you will manage your student account.
If you are enrolled in a course that runs past September 21, 2026, you may still need to access MyExtension during the transition. If this applies to you, your instructor or program manager will be in touch with specific guidance.
Your student records will continue to be maintained after MyExtension is retired. If you need access to older records, contact Student Services at unex-reg@ucsd.edu.
If you are enrolled in a course that runs past September 21, 2026, you may still need to access MyExtension during the transition. If this applies to you, your instructor or program manager will be in touch with specific guidance.
Your student records will continue to be maintained after MyExtension is retired. If you need access to older records, contact Student Services at unex-reg@ucsd.edu.
If you were enrolled in a course less than 10 years ago, your student records will carry over to TSS. If it has been more than 10 years since you last enrolled in a Division of Extended Studies course, your records will not automatically carry over to TSS. Records older than 10 years will not be lost, but will need to be imported to the new system, which will take a few days.
TSS brings Extended Studies into the same system as the rest of UC San Diego. If you have accounts in both, they will be unified — one account, one system and all your academic records in one place. If you are a current UC San Diego student with a UC San Diego email account, you will sign in to the TSS with your UC San Diego Single Sign-On (SSO) credentials. Students who do not have a UC San Diego email account will still log in to TSS, but their sign in process will be slightly different.
Until October 13, 2026, request transcripts through MyExtension as usual. Starting October 13, you will request transcripts through the Triton Student System.
Grading options will be the same and refund deadlines will have no noticeable change in TSS.
You can join the interest list. When a spot becomes available, Extended Studies will contact everyone on the interest list. Be sure to act quickly to complete payment and confirm your booking (enrollment); as always, booking (enrollment) is on a first-come, first-served basis.
Yes. Until October 13, 2026, you can view your completed courses and grades in MyExtension, just as you do now. Starting October 13, your academic history will be available in the Triton Student System.
Until October 13, 2026, continue running your certificate audit through MyExtension (log in, select Courses, and request your audit). Starting October 13, your certificate audit will be available in the Triton Student System.
Summer-Fall Transition
TSS is now live. Most students* enrolled in Summer 2026 courses will continue to access course materials through MyExtension for the duration of those courses. TSS is where you will manage your student account to enroll in Fall 2026 and future courses.
*Students who are enrolled in Summer courses that go beyond September 21, 2026, will have a transition mid-course and receive additional guidance.
*Students who are enrolled in Summer courses that go beyond September 21, 2026, will have a transition mid-course and receive additional guidance.
Many students will receive an email with their TSNs. When you receive this email, follow the instructions. Upon first login to TSS: you will be asked to review/update your personal information, including:
If you do not receive an email and would like to book a course, go ahead and book the course and enter your information when prompted; your new and old records will later be merged.
- Mailing address
- Lived/chosen name
- Direct deposit information
- Emergency contact information
If you do not receive an email and would like to book a course, go ahead and book the course and enter your information when prompted; your new and old records will later be merged.
Starting August 11, 2026 TSS became the system for student account management. If you are booking Fall 2026 courses, you will need a student profile in TSS. How you log in will change, and the way your program and certificate information is displayed will look different. Course names stay the same, though you will notice a slight change in how course numbers are formatted. Summer 2026 courses will continue to be accessed through MyExtension.
If your Summer 2026 course ends on or before September 21, 2026, nothing will change; you will continue to access your course materials through MyExtension. If your course extends beyond September 21, 2026, you will receive separate guidance from your instructor or program manager on what to expect.
The Canvas experience for students is expected to feel the same after the transition.
A small number of Extended Studies courses span the Summer-to-Fall transition period. If you are in one of these courses, you will receive a separate communication from your instructor or program manager explaining exactly what to expect and what you may need to do. Your course, grades and materials will not be lost; the transition is handled on the back end.
Navigate to the TSS Portal (coming soon). You will see two sign-in options:
- Extended Studies students: Choose this option if you take courses exclusively through Extended Studies (no main campus courses) and do not have a UC San Diego email address and AD login.
- UC San Diego students: Choose this option if you are currently enrolled at UC San Diego — either as a matriculated student (undergraduate or graduate) or through Concurrent Enrollment. If you have a UC San Diego email address and are able to log in through Single Sign-On, this is your option.
You may see an error message; that is expected. TSS will not be available to Extended Studies students until early August. If you see an error before that date, simply try again after TSS launches.
MyExtension will remain available for all Summer 2026 courses for the duration of those courses. Starting with Fall 2026, you will use TSS for booking (enrollment), course access and student account management. Your academic records will carry over to TSS. If you need records from more than 10 years ago, contact Student Services at unex-reg@ucsd.edu.