Also just to add to kozlodoev. You might not see any of there levels go up after the training happens (Fridays morning) but that doesn't mean they are not improving. You will only see a level pop* whenthe players skill reaches a certain level, kinda like a player can be on 4.5 and go to 4.9 but you won't be able to see the improvement until he is over 5. Really hard to explain.
*A pop is when you see a level go up.