The study at hand has purposes as follows: 1. To measure through a special test the musical knowledge achievement of secondary school music organizations in the state of Texas. 2. To determine the influence of private music instruction upon music knowledge achievement. 3. To determine the influence of family musical propensities upon music knowledge scores. 4. To determine the relation between music knowledge scores on the one hand and type of music organization and size of school enrollment on the other. 5. To compare ratings in music performance with music knowledge achievement.