How Often Should I Schedule a Lesson?

The frequency and type of lesson depends on many factors such as age, finances, availability of time and level of desire.  However, I believe the the Law of the Farm exists with many aspects of life and certainly does with hitting. 

I believe the best approach is the following:

The first 2-5 lessons should be an hour.  The number of hour lessons would be based on how the progress is going.  Then move to 30 minute lessons each week.  I believe it is better to go 30 minutes each week than it 60 minutes every two weeks.