Each assignment asks you to estimate something by hand, then checks your answer. Where an answer depends on the model, it is checked against a fresh run at your own settings, so the problem sets stay right when the baseline is updated.
Progress is saved in this browser only. When you finish, print the submission page or save it as a PDF to hand in.
Instructors: the link to an assignment opens at the level in its address, for example ?level=graduate. Tailor can also make a frozen link that pins a policy and the baseline for a whole class; open Tailor with ?classroom=1.