A golf driving practice assembly having a base with a recess and an insert that is received within the recess. In a first position a driving surface for the insert extends flush with a surrounding surface of the base, and in a second position a driving surface extends at a sloped angle above the surface of the base. The insert may be invertible within the base and have the flat, flush surface on one side and the sloped, angled surface on the other. In another aspect, an adjustable support may engage an edge of the insert to raise the driving surface of the insert from the flush position to the sloped position. The adjustable support may be provided by one or more flip-up bars set within the recess.