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). MyExtension is becoming view-only, so you can look at information there but not make changes. In TSS, you can find and update your personal information and book or drop courses in one place. Over time, you'll also be able to view your schedule, grades, and student record.
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 is being replaced by TSS and is becoming view-only. You can look at your records and request an enrollment verification for Summer 2026 and earlier, but you can't make changes there. Use TSS to book courses and manage your account. Academic history and enrollment verification are moving to TSS, and we'll update this page when they're available.
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. Academic history is expected in TSS soon. Until then, you can view your earlier history in MyExtension.
Extended Studies and the general campus now use the same student system, TSS. For now, you may see two separate records, one for each, instead of one combined record. This is a known issue, the project team is working on it, and you don't need to submit a ticket. Extended Studies courses are in Extension Canvas and general campus courses are in the general campus Canvas, so you may need to check both. If you're a matriculated UC San Diego student, sign in to TSS with your UC San Diego account using the UCSD SSO button.
Use the order form on the Transcripts page to request your transcript. Transcripts for Summer 2026 and earlier courses are available now, including rush orders. Fall 2026 courses and GPA aren't included on transcripts yet. A new ordering process is expected soon.
Refund deadlines are the same. Each course has its own deadline, listed on the course page, and to receive a refund you drop through your TSS account before it. Grading options are mostly the same: Letter Grade, Pass/No Pass, and Not for Credit, though not every option is available for every course. One change: No Record (NR) is no longer a grading option as of Fall 2026. You can change your grading option through your TSS account.
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 certificate audits are available in the Triton Student System, continue running your certificate audit through MyExtension (log in, select Courses, and request your audit). We'll update this page when audits are available in TSS.
Summer-Fall Transition
TSS is now live. You use it to book Fall 2026 and future courses and to manage your student account. If your course started in Summer 2026 and continues into Fall 2026, your course booking is now in TSS: view it at sis.ucsd.edu. Sign in to Canvas through TSS, and keep using the same course.
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.
You will find the experience of your course in Canvas unchanged, but you'll now reach Canvas by signing in through TSS. Go to extensioncanvas.ucsd.edu and select Fall 2026 and Later. If your course started in Summer 2026, keep using the same course. Your coursework and grades stay where they are. Your course appears in Canvas on its start date. If you've booked a course and don't see it, it can take a few hours to appear. If it's still missing after that, contact Online Learning and please don't drop the course.
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.
If your course started in Summer 2026, your course booking is now in TSS. View your Summer 2026 course booking in TSS at sis.ucsd.edu. Student Services removed you from the old Summer 2026 section so your record isn't duplicated. This doesn't affect your enrollment, coursework, or payment.