This study was designed to examine the impact of three different inservice delivery modes--teleconferencing, workshops, and direct mail--on vocational education teachers' use of new materials. Variables associated with the impact were the extent of the curriculum materials' use, teacher concerns, cost, and satisfaction. Selected personal characteristics as related to use of materials were also studied. Data were gathered through a 35-item questionnaire administered to 98 teachers and by telephone interviews. Results of analysis of the data suggest the following: (1) a great proportion of participants in all groups were using the materials, but the levels of use were higher for the teleconference and workshop participants than for the direct mail group; (2) the cost to conduct the workshop was much greater than the teleconference, but did not improve the level of use of the materials; (3) the direct mail participants were less satisfied with the inservice, while the levels of satisfaction were similar for the workshop and teleconference groups; (4) the concerns of the direct mail group differed from the other two groups; (5) although age and number of years of teaching affected the concerns that teachers had in the three groups, the degree of implementation of materials was not affected by these personal characteristics. As a result of the study, recommendations were made to provide more instruction for direct mail participants and to consider using teleconferencing as a more cost-effective method of inservice education than workshops. (KC)