Family and school partnerships are important for achieving quality results in education and this research is a transient partnership study. In our research, we investigated the communication and participation of parents in decision-making, since both are seen as elements of active parent involvement in building mutual partnership. The purpose of the paper was to examine the impact of an experimental treatment on the development of parent-school partnership in relation to sex and professional qualifications. In this research we used methods: analytical-descriptive method, theoretical analysis method, survey method and experimental method. Parents were interviewed with the same questionnaire before and after experimental treatment (partnership workshops). The research sample consisted of thirty parents of high school students (14 females and 16 males) in the territory of Travnik Municipality. Results of the T-test were statistically significant differences (p=0.05). There is a statistically significant difference for male (t=-4.824; p=0.00) and female subjects (t=-5.192; p=0.00) between the initial and final survey. The differences may be seen in the case of subjects who have elementary education (t=-6.504; p=0.00) and secondary education (t=-5.276; p=0.00). In the case of subjects with university education (t=-2.138; p=0.07), these differences are not statistically significant. Key words: parents, partnership, communication, decision-making.