The purpose of this study was to investigate the effects of FIE-B (EM)-based home-writing activities on the writing abilities and the interactions with their mothers, among children with borderline intellectual functions. Four elementary school children with borderline intellectual function were selected among the elementary school students who visited the B private center in Gyeongsangnam-do A city. A total of 30 seventy-minute sessions of FIE-B (EM) were conducted twice a week, along with parental counseling every session and home connection through parent education. To do this, our study used an ex-ante, ex-post, and maintenance design, and we tested for statistical significance using the Friedman’s Test, a non-parametric version of the repeated measures ANOVA. In addition, the intervention was further divided into four stages, and its effects on writing ability were verified. The results of the study showed that there was a significant difference in all four subjects. Additionally, there was a statistically significant positive effect on the children s writing ability and their interactions with their mothers. This study can be meaningful, in that, it showed how the writing ability of the children could improve through the FIE-B (EM)-based home-writing activities, and how it could have a positive effect on their interactions with their mothers