I've got the opporunity to teach at a centre which has an indoor putting green. The owner of the centre wants to try to exploit the putting side of things a little more and I was wondering if you might have some ideas. The indoor green is about 40 square yards(10x4) with 5 different holes. It has a good flat area in the middle and is sloped at both extremes. I'll tell you what I've done so far.
I purchased a laser trainer at Christmas and on one of the pillars adjacent to the putting surface have hung up the plumb line, which allows students to putt using the laser trainer and at the same time putt along a straight line on the putting surface.
I've got a portable mirror in which students can see themselves putting and check elements of the set-up.
I was also thinking of having an area on the surface of parallel lines, like a checked pattern on a shirt, to monitor the putter face during the stroke, along with the stroke path.
I've thought about etching straight lines into the surface at about a yard from some of the holes for improving alignment of the putter face.
The surface is surrounded by a wooden frame and I've been putting stickers of different colours on the frame with the objective of showing the maximum and minimum breaks possible for holing out on certain holes. I turned my Harold Swash Railmeter upside down to use as a true roller to find the breaks.
Anyway the above are the ideas that have occurred to me, I would appreciate any more suggestions from anyone else.