"enroll" is correct and usable in written English. You can use it as a verb to mean to register or officially enter someone or something (e.g. yourself, your child, into a program, school, or activity). Example sentence: My son has enrolled in the local soccer league for kids.
But challenged by committee chairman Dave Camp, a Republican from Michigan, to provide the number of people who had been able enroll for health insurance, Tavenner said the government did not have the figures.
So far, though, despite their best efforts, Obamacare has proved as "invincible" as the young people it needs to enroll.
Another episode features Jennifer Garner travelling to her home state of West Virginia to help enroll impoverished kids in early education programs.
For-profit colleges enroll only about 12% of America's college students, but they take in over a quarter of all federal financial aid, or around $33bn a year.
Most enroll in a teacher-certification course (some countries insist on this), meaning that university tutors are on tap, too.
On a call with reporters, Kathleen Sebelius, the health secretary, said she expected a surge of young people to enroll by April.
An extra 21.3m people would enroll in Medicaid by 2022.
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Ha Thuy Vy
MA of Applied Linguistic, Maquarie University, Australia