The Standardized Stroke Development System

EASI Tennis has developed a Standardized Stroke Development System (SSDS) to assist those interested in objectively measuring their progress in the development of their strokes.

  Level 1 Level 2 Level 3
Evaluation Criteria

Student hits as many balls as necessary to get ten good shots in the court anywhere.

Alternatively, the student may be restricted to 20 balls and the instructor keeps count of how many good balls were hit out of a sample of 20. This is the fixed sample size approach.

Student hits as many balls as necessary to get ten good shots in the back 9.

Student hits as many balls as necessary to get ten good shots in the back 9 and to the right of the service line.
       
  Data Computations Score
Scoring Procedure

Instructor records the ball velocity of each good shot in their book.

The instructor also records the total number of shots needed to get ten good shots.

The first number computed is the frequency of a good shot. This number is 10/(#Total Shots) or the total good shots/20 if the test is using the fixed sample size approach.

From the radar data the instructor will compute the mean and the variance of the ball speed. (the computation of the mean and variance may be performed offline).

 

Scoring: The student's score is computed by multiplying the two numbers obtained in the computations stage and dividing by 10.

The product of these two numbers is the student score. It will be a value between 0 and 10.

       
 

Student Placement

Ball Velocity Standardization  
Notes

The student stands 3-6 feet behind the baseline centered at the service T.

 

A ball machine is used to fire balls from the baseline that land in the back nine at about 50mph initial speed.

Test should be performed indoors or with no wind outside