Most golfers miss putts not because of a bad stroke, but because they read greens wrong. Learn how PGA Tour pros break down putts using green-reading geometry, aiming points, and simple visual cues.

The former sixth-grade math teach is going back to school. That would be Michael Greller, who left his old job to caddie for Jordan Spieth in 2013. At Spieth’s request, Greller has been studying up on ...