Doug Eng's recent article in the May/June 2013 issue of TennisPro magazine is full of good info for
Get a tennis photo from a magazine. Big with lots of details is best. Show the photo to your students for about 20 seconds, then remove it. Ask them questions about the picture - male or female player? Name? Equipment brand? Color? Stroke (forehand/backhand)? and other details. Points awarded for each correct answer.