The entrance exams served to weed out all but the most motivated, self-disciplined and hardworking students.
If you're not a self-disciplined person, online learning is probably the worst thing for you since you don't have to log in, and it's really easy not to.
Sometimes players who are self-disciplined work harder than they need to work.
He was self-disciplined and cared deeply for the political aspects of what appeared to be mundane administrative and organizational matters.
Local authorities have carried out a self-disciplined capping for the past two or three years, but there are limits to what they can do.
The unemployed in those days were perhaps made of sterner stuff and were more self-disciplined.
A child who is taught that there are boundaries to acceptable behaviour will grow up responsible and self-disciplined.
