Again not a mama to teen, but was a teen not long ago.
At 15 I was 5'10 and about 135 - athetic, thin, but not quite grown into my body (ie. looked 'odd')
By the time I was 19 I was 5'11 and 160lb, finally fitted into my body correctly, with still and athletic but curvy figure.
(I have always been tall, and slim but not skinny)