When starting beginning trumpet players, I have students immediately go to D and C#/DH below the staff in their method book. Have them write in “S” on D and “SS” on C#/DH. “S” is for Slide and “SS” is for Super Slide. Teach using the 3rd valve slide and 1st/3rd slides from day 1 when learning those notes. I would tell my students there was a “misprint” in the book and they needed to add the slide reminders.
Rebecca Warren
Mandan Middle School Bands (Retried), Mandan, ND