I'll echo the "Thank You" to Jim Wendler.
I've enjoy the simple progression of 5/3/1 for several years, but this is more about my son. He plays Jr. league football and next year he will be a Freshman. I started training him at 12 with nothing more than Push-ups, Pull-ups, Goblet Squats, Back Raises, and such. At 13, when puberty hit, I was looking for a nice way to break him into weight training.
I added form work for Bench and Squats and only added weight when he was bored with the weight being used. When he got strong enough I implemented 5/3/1 with 5s Pro and FSL (3x5). His routine today still only consists of Bench, Squat, Prowler, and all the bodyweight stuff. But with the help of Mr. Wendler's methods, he can now easily squat 225 for reps and Bench 135 for reps. I now feel good about turning him loose on the High School coaches and know he has a good foundation in form and work ethic. Thanks again.