Instrumental instruction
All instruments
Why Being Too Quick to Offer Feedback Can Degrade Learning is an article by Dr. Noa Kageyama and published by Bulletproof Musician; it describes how teaching a student to self-evaluate can help the student make better strides in development.
F horn
Teaching the French Horn - Why All the Mystery? is an article by William C. Robinson and published by Conn / Selmer; it provides a brief description of the fundamentals that a horn teacher should apply in teaching horn students.