The purpose of this study was to investigate the effectiveness of cognitive-behavioral program training on decreasing the aggression of fathers of students with ID. The present study was a experimental study with pretest-post-test design with control group. The statistical population of this study was all fathers of the elementary school ID of a district of Ahvaz in the academic year ... https://countryscenesaddleryandpetsuppliers.shop/product-category/acavallo-gel/