teacher rec letters

do the teachers send their rec letters to each college I applied to, or do they just upload them on naviance? also! can I replace one of my teachers rec letter with a rec letter from my intern (outside of school)? thank you!

In general, they write one rec.

If the college asks for a teacher, they mean a teacher - no substitutions.

thanks for the reply, so do I have to tell them which colleges I’m applying to, or do they upload the letter on naviance

It might depend on your school. You should check with your guidance counselor. DS had to give GC a list of schools and names of recommenders and the GC took care of sending them through Naviance.