Once the player has achieved a reasonable level of consistency on the range I explain hitting balls on the range (even if they have progressed away from block practice to variability practice) is different from the the actual playing of shots during a round. The success rate of range versus actual play is usually lower.
To elevate their course play I suggest they take their practice to the course and alternate playing 2 games. The first would be the “one-man scramble” and the second is “worst ball”, using 2 balls. The first game is somewhat self explanatory, the second is playing the worst of the 2 shots continuously until the ball is holed. I explain these 2 games will give them a realistic view of their skill level, and insight into what are the weakest and strongest parts of their game.