I believe with the new PPL rules there will be a need of 100 hours ground school to be provided by the training provider, the rest is selft taught.
No, there is a requirement for 100 hours of theoretical knowledge instruction, a proportion of which must be formal classroom instruction and the remainder may be by other means including 'directed' self study. The proportion of formal classroom instruction may be as low as 10%
Although if any authorities are actually checking that is happening, I'd be surprised.
The UK CAA, for one, is very hot on this and it would be dangerous to assume that they will not require evidence that the full 100 hours is being completed.