That answers a question that's been roaming around in my head for some time about A levels, from reading novels set in the UK. Thanks.
In the US:
High school - 12 years starting at 5-6 years old
Associate degree - Two years post education completed. About 60 credit hours.
Technical or Trade degrees are very common (and very needed) in the US.
The most common we have now is:
Primary school - 4-5 up to about 10-11
At this point there is the option to take an exam called "11+" which a pass qualifies entry to grammar school (a fail or not taking means comprehensive or other name).
Then you change school into:
Secondary school, either grammar or comp. - 10-11 up to about 16. This leads up to taking the GCSE exams (general certificate of secondary education) in certain compulsory and additional optional subjects, usually 3-11 subjects.
Next for 16-18 year olds, and still in compulsory education (now, compulsory education finished at 16 when I was younger) comes A levels in subjects of the student's choice, the results of these provide 'points' for entry into university if desired (or transfer to apprenticeship or other training scheme instead of A levels). A levels can usually be taken in the same setting as secondary education, but some don't provide any or all facilities so another transfer is also an option, either to another school or college (UK college is not the same as I understand the US college - US college = UK university).
After post secondary school or college is university, for degree level subjects.
As far as I'm aware, we don't really have the equivalent of a trade degree - unless a completed apprenticeship counts as such, but it's still not considered equal to an actual degree (very roughly, usually, apprenticeship = hands on trade work, degree = more academic).
Still used sometimes is the older system of first-middle-upper schools followed by college and then university, but that's rapidly becoming extremely uncommon.