A good youth chess teacher should have a good understanding of the game as well as the skill to make learning fun. Teaching and playing ability are two different skills. However, if you are paying an instructor for lessons you should look for a teacher who has both good teaching skills and playing ability. Just like with any subject a teacher cannot effectively teach what they don't know. These are only general guidelines for a paid instructor.
Fees charged for lessons can vary greatly.
Rates may depend on whether the instructor must travel to the student. Group lessons should cost considerably less depending on the size of the group. A good teacher has prepared lesson plans and a developed system. The main format of lessons should not consist of the student playing games against the teacher. When students have gained the experience they should record their games against other players and bring them to their teacher for analysis.