The first University of Maryland two week residential police instructor seminar on training (PIST)--a pilot project--was held during May 5-11 and May 26 through June 1, 1968; the second, incorporating changes arising from evaluation of the pilot project, was held April 27 through May 3 and May 25-29, 1969. Participants in the two programs numbered 21 and 17, respectively. In the first PIST, the instructors practiced various training techniques during both weeks. In the 1969 PIST, the first week was devoted to learning about techniques and their application, with the second week devoted almost wholly to practice exercises. The primary reason for this change of rationale was the need for preparation during the weeks between two halves. Greater emphasis in the 1969 PIST was placed on developing the instructional ability of individuals, and on using small group discussion. Reading materials for both PIST seminars included Staton's "How to Instruct Successfully," and a notebook of instructional materials and articles. The second seminar in particular was well received, and most particpants reported they had acquired new ideas and practices. Almost all participants agreed that the program should be extended to three or four weeks, including more time for practical application exercises. (LY)