Former United boss Ferguson believes that Van Gaal is keeping within the club's traditions by showing faith in their youth prospects.
"What has pleased me about Louis is he's given seven young kids their debuts this year which falls into line with the history of our club, there's no question about that," Ferguson told MUTV.
"I think that's exactly what Louis van Gaal believes in too. Obviously Louis has made a lot of changes and I was thinking about that actually.
"Maybe he's doing the right and correct thing, to clear the decks and build his own team, because he's got the experience and the coaching ability to do that. And he's got the reputation to do that. I think the way he's approached is, I think, brilliant."
Van Gaal's side currently sit fourth in the table.