As a supplement to the standard in-school high school curriculum, the Executive High School Internship Program provides experiential learning opportunities for gifted high school students. The program focuses on management-level field placements through which participants learn to make decisions, interact with the world-of-work, and assume responsbility for their actions. In 1977 a pilot project was conducted to mainstream gifted handicapped students into the on-going internship programs. Eight school districts (twelve students) participated in the one-semester demonstration pilot. Assessment focused on its effects on students, sponsors, coordinators and school personnel. General program characteristics were examined to determine feasibility of program expansion. Learner outcomes and process objectives were outlined by program participants and formed the base of the evaluation. Pre- and post-test instruments were used in combination with on-site visits to participating districts. Based on evaluation results, it was concluded with the exception of one internship the mainstreaming project was successful. Handicapped interns were able to compete successfully with non-handicapped peers in independent world-of-work situations. In addition, handicapped students were able to integrate fully into the seminar setting. Only one of the site sponsors expressed reluctance to work with a handicapped intern in the future. Several sponsors expressed the desire to see the program extended. (BM)