Revised Concept Sketch

In my concept sketch, I put lockers in blocks of 20 so that half the lockers open one way from one side and the other half open the other way from the other side.  The locker set would be sunk into the ground and attached with a chain to a metal loop.

The Problem with Lockers

In my time in school, I have noticed that the way that lockers are set up is not efficient.  There are too many people and too little space for everyone to access their things at the same time.  I have narrowed the problem down to two things: space and time.  First of all school lockers are usually found in huge clumps.

http://upload.wikimedia.org/wikipedia/commons/0/06/School_lockers,_National_University_of_Singapore.jpg

This doesn't leave much area per locker for students.  It would be much easier if they were grouped in smaller clumps.
The other problem is time.  Most students use a number combination lock on their locker, which can be frustrating and time consuming to open.  This makes it more difficult for students to quickly open their locker and move out of the way. 
My solution is to group lockers in clumps that are not against a wall, for example, this group of 16.  Each set of 4 lockers faces a different direction.

Also, to save time, students should use these Master locks which use four arrows instead of numbers.

http://www.amazon.com/Master-Lock-1500iD-Combination-Assorted/dp/B002TSN4SQSince these locks can be reset, the school could rent them out.
All of this will save time for students trying to get to class.

"Problem" Research

In my research, I have discovered a few things in the world that I consider problems.  I think that at this point in time, there should be better replacements.  First of all, most people have called a big company on the phone and have been put on hold for more than 5 minutes.  This is bad for the customer because he or she gets annoyed and may hang up.  This is bad for the company because they may lose business.  Also, lockers should be laid out differently.  Currently, many schools have about 50 lockers in one block, making it difficult for every student to access their things.  This is annoying and inconvenient.  Finally, overhead compartments in airplanes should be redesigned.  There is never enough space for everyone's carry on bag.  Also, the maximum dimensions for luggage are very specific and often hard to meet.  It is difficult to access your things, especially when you are asked to sit down.  These three things are problems in the world and should be improved.