Teaching a puppy to heel

[PuppyAdvicePlease]

My pup is about 18 weeks now, had her for 3. She is doing really well in all aspects except she always pulls on the lead when out for walks. When I do the training by calling her back to me, getting her to sit beside me and give her a treat for doing it she starts pulling again immediately after setting off again. Then the process starts all over again, I'm sure she is doing it just because she wants the treats lol. So any ideas? It took 30 mins to do a 10 min walk last night (and I gave up at theend and ran the rest of the way with her)

Oh and what is better harness or collar?
Thanks

Ooops forgot the title

First off congratulations!!

And secondly well done for working on this now but remember that she is still a baby and still really distracted by all the super exciting stuff around her, so if I was you I'd practice in the house or garden, a less stimulating environment. There are several ways of teaching it, have you done any clicker training? That can work, or changing direction frequently and abruptly so she can't just assume you are going straight ahead.

I don't have it but I've heard good things of this Rugaas book

Remember puppies don't have long attention spans so little and often is better, as to collar or harness I think depends on the breed and personality of the dog.

Yes I'm doing clicker training and no not tried it in the house yet. Would that not confuse her if I'm teaching her indoors not to pull, but when we go for walks she can (til she gets used to it indoors)
I've thought about doing the change dirctction thing but ill look like a numpty lol. Because of the snow there's not many places to go round here (but I think its due to melt this weekend) so may take her to the park to try it next week.. I just received a 16 meter lead yesterday, so dying to take her to to try it out, to see if our recall training will work (she's pretty good in the house and out on walks)
She's a lab x springer.

Sounds bouncy!

When you're training on a long line always use a harness, you don't want to be bringing her up short if it's attached to her collar.

Apparently dogs associate behaviours to a place, so if you teach your dog a sit in the house you may find she won't get it when you ask her to sit in the garden. Consequently you have to generalise the behaviour and teach in multiple locations. So teaching her not to pull on lead in the garden won't confuse her and although she may not instantly transfer the behaviour to the street you'll have set the foundations.

I know what you mean about looking like a numpty, I'm sure all my neighbours (and many random strangers) have thought me completely insane while doing my ministry of funny walks. But hey, you've got a labxspringer pup, this may be something you need to embrace! Might as well get started!

P.S. If you report your thread to MNHQ and ask nicely they may change the title for you so you get more responses.

Thanks for all the help. (have reported title too) I shall have a go at teaching indoors next week (cant do it when kids are here cos they "want a go") Theres a large piece of grass over the road (but not encloses and main roads) and i take her over there on the 5m lead and run in one direction then change direction (dont feel as daft doing that!) so she follows and she's ok at that now, just need to try to turn it into a walk!