chess study plan for a young player ?

There is no standard curriculum I've ever heard of. I recommend distributing the aspects of chess evenly, however: tactics, strategy, practical experience, openings, endgames, reading instructive games, and more. It is difficult to allocate some of those into particular tasks, however, such as how much to read daily about strategy, how much to study master games, etc., not to mention how to split tactics into puzzle type versus practical type.

1. Forget about "rapid progress"

2. Learn Opening Principles.

3. Tactics...tactics...tactics.

4. Basic endgames:

KP vs. K

Basic Mates:

KQ vs. K

KR vs. K

KRR vs. K

You must know the tactical level of your son. If he has diffuculty in solving majority of the puzzles in a book like Chess Tactics for Champion by Polgar, then he needs to get better at it.

Study the basic endgames like opposition, R+k vs K mate and Queen against pawn(queening square). Study basic positional ideas like rooks are good in open file, power of the rook in the seventh rank,bishops are good on open positions, knights needs a good outpost. Give him easy examples for this. But the focus of his training should be tactics.

Thanks guys.  he knows basic mates, is now working through chessimo endgame drills.  His tactics rating is 1350.  His OTB play (USCF rating) is somewhat low based on lack of experience (and he struggles with notating since he is just learning to write).  I will look at the Polgar book.

That is too harsh but I do agree you need consequences for not putting in effort.  I did say that he cannot enroll in a tourney until his tactics rating hit 1300 (from 1000).  He did it in 2 days.  After weeks of laziness and stagnation.  I am asking him to be 1500 by December or else we will cut off tourneys until he hits that next goal.  

https://www.chesskid.com/article/view/chesskidcoms-curriculum

Motivation is good. But just a suggestion, you must also asses if the goal is achievable in that time frame. If the goal is not achievable in that time frame, give more time.

Yeah get that Polgar book as that will show you how competent he is at tactics. That book is  for advance beginner. If he finds the problems in that book hard, he still has long way to go in his tactics training.

When I teach my nephew tactics, I first show him the tactic patterns. Then I will ask him to solve tactics based on that pattern. If he can't find the solution after trying for 8 minutes, I will show the solution and let him solve another problem. I will also try to let him solve the same problem the next day. I used the Polgar book for this. Once he got better at tactics, I let him solve harder problems from harder puzzle books.

Now how fast your son can better at tactics depends on motivation and talent. 

For opening principles that you can teach your kid, try to look at this.

https://www.chess.com/article/view/the-principles-of-the-opening

Once he got better at tactics, you can now teach things that came from a book like Logical Chess Move by Move by Chernev.