The efficacy of Solution-Focused Family Therapy (SFFT) for helping three families with aggressive and oppositional-acting children (aged 8-9) was examined. The N=1 multiple-baseline design with three replications used validated measures, a treatment manual, and a treatment integrity measure. The interventions lasted from four to five sessions. SFFT appeared to be effective with the families at post-treatment and 3-month follow up. THERAPISTS NEED EFFICIENT, effective interventions for aggressive-acting children because of our high number of referrals and the pressure for quick results. More i...