A friendly guide to the US college and university system for anyone coming from the UK (or just curious). Search any term, flip on "false friends" to see the words that mean something different in the UK, and use the journey and structure tabs to get the whole mental model, not just the vocabulary.
The most common route at a glance: the four-year bachelor's path from applying in high school to graduation. It isn't the only path, see "Not everyone takes the 4-year route" lower down. The detailed timeline is below.
Where the key decisions happen. Most confusion for UK colleagues comes from when things occur, declaring a major is not at application, and registration repeats every single term.
Myth: every US student fires off applications to a dozen universities. Reality: plenty apply to only a few, or even one. The selective, apply-everywhere scramble is mostly a top-end story.
A very common, practical approach is:
To enroll at a college or university you normally need a high school diploma or a GED (the equivalent for those who didn't finish high school). Beyond that, requirements range from open admission (a pulse and a diploma will do, common at community colleges and many state schools) up to the highly selective privates that reject most applicants and may require SAT or ACT scores.
The map above shows the common four-year bachelor's path, but it's only one option. Plenty of students take a different route after high school:
So when picturing a US student, don't assume the four-year campus path. The route depends on goals, cost and circumstances.
One institution nests like this. The word "school" appears at two levels, which is a common trip-up.
University › College / School (e.g. School of Engineering) › Department (e.g. Mechanical Engineering) › Major › Course › Section
Every term, a student opens the course catalog and builds their own timetable. They don't just get assigned classes. They pick the courses they need, and often the specific section, which means choosing the professor and the time slot that fits around their other classes, a job, or commuting.
Each course is offered in one or more formats:
Common misconception: people assume a student is either "an online student" or "an in-person student". For most campus students it's neither, a single student routinely mixes all three formats in one term, choosing each course's format to fit their schedule.
But fully online does exist too: separately from mixing formats course by course, many universities offer entire degrees, certificates and programs online, completed with no campus attendance at all. Schools like Arizona State University run both campus and fully online versions of programs, and others such as Utah Valley University have dedicated online offerings. So a student might mix formats on campus, or do the whole thing online, both are normal.
The best way to understand registration is to browse an actual catalog. These are public, no login needed. Search a subject, then look at the individual courses, their numbers, credits, times, formats and sections.
Tip: pick one subject (say "Biology") at each and compare. You'll see the same building blocks, courses with numbers, credits, prerequisites and sections, across very different institutions.
Courses are numbered by level, which tells you the difficulty and roughly when you take them. The first number is the giveaway:
Prerequisites enforce this order: you must pass the earlier course before you can register for the next. That's why a student can't just jump into an advanced class, they have to climb the ladder. (Numbering schemes vary, some schools use 1000 and 2000 instead of 100 and 200.)
The common rhythm is two main semesters, fall (Aug to Dec) and spring (Jan to May), plus an optional summer session.
Students use summer to graduate faster by going "straight through" the year, to catch up, or to retake a course they failed or want a better grade in. (Schools on the quarter system run fall, winter and spring quarters plus an optional summer instead.)
Gen eds are the breadth requirements every undergraduate must complete outside their major, usually in the first two years. There is no UK equivalent. Each university sets its own list, but the categories are fairly standard. Typical buckets:
A student picks specific courses to "satisfy" each bucket, so two biology majors can fulfil the same humanities requirement with totally different classes. This is the heart of the US liberal arts model: depth in your major, breadth across everything else.
A huge number of US students deliberately start at a community college to save money. Tuition there is far cheaper per credit, so they take their general-education courses (the broad first-two-year requirements) at the community college, then transfer into a 4-year university to complete their major. The bachelor's degree is awarded by the university, and the diploma looks the same. This route doesn't exist in the UK and surprises many British colleagues.
US students can begin earning college credit before they even leave high school, two routes worth knowing:
Both mean a student can arrive at university already part-way through their requirements, sometimes a full semester ahead.
The baseline to enroll anywhere is a high school diploma or a GED (the equivalent for those who didn't finish high school). Above that baseline, selectivity is a wide spectrum, not one bar:
The SAT (digital, scored to 1600, no separate science section) and the ACT (scored 1 to 36, with a science section that became optional in 2025) are interchangeable, colleges accept either. Students take whichever suits them. There is no UK equivalent; UK admissions lean on A-level grades instead.
Despite the stereotype, not everyone applies to a dozen places. Many apply to just a few, or one, picked on a practical basis: which schools offer their degree, what it will cost, and whether a nearby state school will take them. The apply-everywhere race is mostly a top-end phenomenon.
Tuition (the price of instruction) is usually tied to credit hours, the unit that measures course workload. A typical course is 3 credits, and a bachelor's needs about 120 credits to graduate. How those credits are priced depends on the student's load:
Why it matters: a motivated full-time student can load up on courses inside the flat-rate band to graduate faster or explore more subjects at no extra tuition. The exact thresholds vary by institution, so treat 12 and 18 as typical, not universal.
Because a full-time student inside the flat-rate band pays the same tuition whether they take, say, 12 or 16 credits, adding an extra elective often costs little more than that course's student fees. The tuition is already covered.
So students use electives to try things cheaply that would be expensive outside school: scuba diving, tennis, ice hockey, social dance, photography, cooking and the like. They also break up a heavy load of hard major courses with something enjoyable. It's one of the genuinely nice quirks of the US system, and a useful thing to understand about how students actually fill their schedules.
The "sticker price" is rarely what a student actually pays. Financial aid is the package that reduces it, and it's central to how Americans choose a school. It starts with the FAFSA (Free Application for Federal Student Aid), the form that determines eligibility for federal support. Aid comes in four main types:
Quick distinction to remember: scholarships and grants are free money you keep (merit vs need), loans are borrowed and repaid, and work-study is earned through a job. A student's "aid package" is usually a blend of all four.
Build a Fall schedule the way a US student would: pick courses to land in the full-time band (12 to 18 credits, aim for about 15), cover the right mix, and avoid time clashes. Pick a starting point, a Biology major or a still-exploring undeclared freshman.
Test how well you really know the US system. No prep, no shame, just find out where the gaps are. Share your score and see if your friends can beat it.
Questions spread evenly across every topic. Pick a length: