Self-teaching machines housed in trailer-classrooms were used for the third year to help 331 students in two Minneapolis Title I secondary schools improve their reading skills. A gain of one month or more in grade equivalents (using Gates-MacGinitie tests) for each month of attendance at the centers by at least 50 percent of the students was the specific objective of the project. In 1972-73 the program again more than achieved its goal. Test results showed that 85 percent of the 218 students with gain scores made grade equivalent gains in comprehension greater than gains expected for length of enrollement in the program. The median grade equivalent gain was +1.6 although the students had been on roll for less than half the school year. The project featured the use of TV-like teaching machines and educational materials developed by Dorsett Educational Systems. Machines were housed in two large trailers which were located at Bryant and North secondary schools. Although students operated the machines and tested their own progress at the end of each lesson, assistance was available from the certified reading teacher and paraprofessional who staffed each trailer. Financial support for this project came from Title I, ESEA. Several recommendations, including continuation of the project, were made. (Author)