I love teaching golf and I especially love teaching golf to students who are willing to put in the time to practice. I stress this to all of my students but especially for students who purchase lesson packages and plan to have a lesson on a weekly basis. I make the commitment to my students and I expect my students to make the commitment to practice what they have learned in the lesson. Why? I don't like to see people waste money.
If a week goes by and my student has not practiced, it is very unlikely that we are going to make much progress in the next lesson. I want my students to improve in their skills and their game. That progression happens during a student's practice time when neural pathways are created.
Neural pathways are formed whenever we start a new behavior. Golf can be a new behavior for a beginner student or it can be an existing behavior that needs to be altered for an amateur golfer. Either way it takes time for your brain to impress the new behavior into your memory. Just like riding a bike, once you have learned you do not need to learn again.
Golf skills, however, require more practice because learning how to swing a golf club is only the beginning. The physics of the golf swing will take you on a journey of varying emotions as you play the course. It is not something that you will master after one lesson without practice. For this reason, I do not recommend taking a lesson just before your tee time.
If you want to progress, make the time to practice. If life gets in the way and you cannot practice; reschedule your lesson.