specific training

got a question regarding training youth,

since forever i've been training my youth with a simple 'training match' and i'm wondering what the best training methods/strategies are for training youth. do i switch it up for all my youths or have seperate youth groups with keepers/defenders, etc. to varie in training? or do i just chuck em in senior group training once all stats are 30/30/30 or 40/40/40 for example?

thanks for tips in advance

I used to train only training match until they were at 30 rated and roughly around 30 in each stat before hitting more key stats from them on. But everybody does it differently and different things work better for different people I guess.

But I made some good profits from doing it this way. Few examples here:

https://www.virtualmanager.com/players/15796095-algot-tesman/history

https://www.virtualmanager.com/players/15804765-pauli-hentze/history

https://www.virtualmanager.com/players/15908972-arnold-gheeraerts/history