There were two major objectives in this experimental study. First, to identify the types of teachers who originally used the new learning package in mathematics. Secondly, to study the effect of the persuasive message on the intention to use the learning package in the near future in different types of teachers. 
                        The samples in this experiment were 200 mathematic teachers from 32 secondary  schools in the educational region 12. These schools were of 3  sizes, medium, large and extra-large, These teachers were randomly assigned to one of the two conditions, In the experimental condition, the 100 teachers received a written persuasive message which specified the advantages for using the mew  earning package. In the control condition the 100 teachers read irrelevant message of equal length which took about 15 minutes. Before these teachers read the messages, they were asked to respond to a set of questionnaires which assessed their prior adoptive behavior, their 5 psychological characteristics (attitudes towards the teaching perfession, attitudes towards the teaching of mathematics, belief in internal locus of control, achievement motivation and congnition of social support ) and other biosocial qualities. After reading the messages these teachers gave their ratings of the intention to use the package in the near future. Equalities of the experiment and the control groups on prior adoptive behavior, and on each of the 5 psycological characteristics were confirmed by the analyses of the data. 
                The data in this experimental study were analysized by performing the Analysis of Variance, and the Multiple Regression Analysis in the total samples and in the subgroups divided by the characteristics of the teachers and the schools. 
                The major findings of this experimental study were threefoleded. 
                 First, the adoptive behavior was found among all teachers  with highly favorable atttitrdes towards teaching mathematics and especially lady teachers, young teachers, low income teachers and less-trained teachers. 
               secondly, the teachers who received the pesuasive message showed stronger intention to use the package than the control teachers. These results were found in two types of teachers,  (1) the teachers with more psychological readiness in the schools without the curriculum development project, (2) younger teachers (less than 38  years of age) 
with more favorable attitudes towards the teaching profession in the medium-sized schools. 
               Thirdly, among the teachers who received the persuasive message the following 
3 types of teachers showed stronger intention to use the learning package than their counterparts. (1) the teachers with prior adoptive behavior, found in the guoup of younger teachers, (2) teachers with more psycological readiness, found in the group of teachers in the schools without the curriculum development project, (3) Teachers with more favorable attitudes towards the teaching profession, found in the group of younger teachers in medium-sized 
schools, and in the school in the inner districts, 
                Finally, the 5 psychological characteristics and the prior behavior together were found to predict the variation of the intention to use the learning package of the experimental teachers than of the control  teachers the two most important predictors of intention were the attitudes towards mathematic teaching and the prior adoptive behavior. 
              This experimental study renders the conclusion that the persuasive message will be highly useful in teachers with more appropriate psychological qualities. Therefore, it can be suggested that the teachers should received some psychological trainings together with the persuasive message.