Teener

1952, American Psychological Association, Journal of Consulting and Clinical Psychology, American Psychological Association (1952), p. 159, […] adult periods and emphasizes the importance of the total teener in a social milieu.

a'''1968, Upton Sinclair, When I Was a Teener.

1975, Fely J. Cruz, I Married a Newspaperman: A Collection of Articles, Verses and Short Stories, T. F. Valencia (1975), p. 1923, To a Teener Celebrating Her Last Teen Year

Also, warn your teener that in this age of undisciplined classrooms, they are unlikely to have a teacher who demands that the class obey—(the major reason why European and Japanese school children score so much higher on ANY test than American kids).