In my experience, goal keepers are short changed in their training. Unless there is a special goal keeper coach, coaches find it hard to find the time necessary to work with the keeper. Even when the coach has the desire to spend time with the keeper, it is hard to find the time during practice. If the team has two keepers, they can work together.
Too many coaches limit goal keeper training to kicking a few balls at the keeper followed by using the keeper in the team's normal shooting practice. In my opinion these shooting practices are all too often a waste of the keeper's time. First, there is no set idea by anyone, coach, keeper, or shooters, about what the purpose of the drill is for the keeper. Is she supposed to work ˙˙on low balls, high balls, or what? Coaches don't work with field players without an idea of what they expect from the practice, and keepers deserve the same.
Second, the players put the ball everywhere but on net. They kick the ball over, around, and if it were possible under the goal. If the ball is not placed on net, the keeper doesn't get any work. The players should concentrate on getting the ball on net and forget about trying to hit the corners. (Let them work on their own at hitting the corners.)
Related to the above is the desire of the shooters to put the ball where the keeper can not make the save. In order for the keeper to benefit, she MUST be able to make the save. When she doesn't make the save, the coach needs to COACH her by discussing what went wrong. Why did she miss the ball? Was the foot work wrong, was the catching technique poor, was the positioning poor, or what ever. The coach should not let her go back to the goal until the fault has been corrected. This can take a minute or so of time. Of course the shooters don't want to wait and the coach usually doesn't spend the time.
Remember that the goal keeper is the only true specialist on the team. She requires special training to properly do her job.