The impact of aptitude differences on learning performance is assessed. As a result of the assessment, instructional strategies are being developed to make efficient training programs for men of differing aptitude levels. Observations were that the high level group did better when left without a structured training program. The middle range was also able to work at its own speed but preferred to have authority figure who could answer questions around. The low aptitude groups required a complete structured program in which the instructional sequence is kept down to small steps presented on an elementary language level. (Author/JK)