It ultimatly depends on your ato.While training for the lapl my ato gave me some 15 year old incomprehensible manuals and the instructors just preached their quote for the day so i had to self study with whatever i could find on the internet and i had to get help from my friends to prepare for the exam.Personally i found online groundschools to be much better since they allow you to study at your pace from the comfort of your home and you get to choose the manuals you like.