Censer's methods have been widely debunked by the dog community and there is much better advice available.
Your dog is a teenager and they all go a bit daft for 3-5 months where it will feel like you are going backwards or getting nowhere
The trick is to persevere, be patient, be consistent and to some extent be relentless. The work you put in now is never wasted - even when it feels like you are getting nowhere.
I've got a 3 year old lab - who is as most labs are - extremely food motivated. Like most labs would be fat as butter if I let her so this l is what works.
She works for her food - at least half her daily food allowance of it is fed on walks or I. The house by hand as a reward.
To start with you reward for attention. I tend not to use her name (because she hears it all the time out of context).
Non pulling and recal starts in the house - not outside.
My word is "here". To start with just a short "here" - she looks at me = and I say "YES" and piece of kibble. You need to get your timing right and say YES when you get there attention and then reward.
Do this 100 times in a couple of days just as you wander around the house/garden and you've got a dog that now has a very solid association that that word means pay attention to me and good stuff happens.
You can then start with calling heeerrreee when the dog is not in sight in the house/garden and do exactly the same reward YES and kibble.
You don't need to do training sessions as such - just have a bag/pocket full of the bag sat worth of kibble
Do this 50 times a day for a few days - just as and when you remember and you basically got 50% of the recall training done.
By a long line off Amazon 20 -30 foot and that is now how the dog goes off lead until you've got the same instant reaction out and about. Do t let the dog spend the whole time at the end if the lead - you reel it in an out as toy walk along.
Same recall came 20/30 times on every walk with a hereee/yea/kibble every time
It may be months - up to 3 of doing this - eventually letting go of the lead as you get more confident - it might be a long process because your dog is a teenager and it al is just a bit too exciting. You and your food and praise has to be more exciting.
Do t just hand feed the kibble - throw it up in the air to catch, throw 3-4 pieces at once, run backwards when you throw it. Make you fun.
I look like a nutter when I'm training recall BUT my labs is perfect - I can recall her from mod play/deer/anything.
And here's the think I still recal train her on every single walk 3 years in. At the start and at random points in the walk I recall her for a YES and treat - 5-10 times every walk. Because then when I need her to come - I can 100% guarantee she does. It means she has a lively life and is off lead 90% of the time.
I foster dogs of various ages from puppies to adults - all different breeds and do broadly the same process with all of them. It works on all dogs. Sometimes quickly, sometimes more slowly - but it works and it makes having a dog so much easier because you can completely relax when they are off lead and they get to have loads of freedom.
If you can walk off lead you can do shorter walks and both enjoy them much more.
If it seems like a lot of work -'it's not really - it just becomes a habit and it's worth it for the long term benefits. You have to remember you are trading your dog al the time - you just don't realise it.
Sorry that's a long one - I can give you equally long tips on getting loose lead walking if you'd like.
As I said, I have a lot of dogs over the course of the year and the main things I teach them all is recall and no pulling.