Bring your books to class. Come for extra help if you need it.
And wear your uniform with pride.
"Young men, you think you can get a haircut and say I'm done for two or three weeks.
WRONG," Sgt. Major Thomas Smith Jr. intones.
"Young ladies. There's been no problem with your uniforms but there is a problem with your ties.
Again, I will go through it again. Wear your ties when you come to my class."
One in 10 public high school students in Chicago wears a military uniform to school and takes classes -- including how to shoot a gun -- from retired veterans.
That number is expected to rise as junior military reserve programmes expand across the country now that a congressional cap of 3,500 units has been lifted from the nearly century-old scheme.
Proponents of the junior reserve programmes say they provide stability and a sense of purpose for troubled youth and help to instill values such as leadership and responsibility.
But opponents say the programmes divert critical resour