For the past 15 years, I have been teaching beginning, intermediate, and professional guitar players weekly lessons on a one-on-one basis. More recently, I have also been teaching group lessons to children and adults at Pima Community College.

Since 1993, I have taught electric, acoustic, and nylon-string (classical)guitar to hundreds of students during more than 30,000 lessons.
Despite the large volume of lessons, I always tailor my instruction to the individual--generally focusing on the student's strengths.
Why strengths? you may ask, And not weaknesses?
My answer is that there is only one way of improving on the guitar, and that is to play it. I've found that by focusing on strengths, students stay more interested and more motivated and tend to practice/play more.
Beautiful.  Due to the increased interest, time spent with the instrument, and confidence, the weaknesses are being improved on while the strengths are being worked on. It's kind of sneaky, but it works.