This study investigated the impact of the Dutch family-oriented Collaborative Learning intervention, characterised by a partnership approach and provision of personalised support. We assessed effects on parents' home-based school involvement, perceived quality of the parent-teacher relationship, and parenting skills. Fifty-six families with children in grades 1-4 (aged 4-9) were randomly assigned to an intervention or waiting list condition. Results of two path models, using cluster-robust standard errors to adjust for nesting within our data, and controlling for baseline values of our outcome variables, indicated small improvements in home-based school involvement among families in the intervention group, but no differences in the perceived quality of the parent-teacher relationship nor in parenting skills. Our findings provide preliminary evidence for the idea that, under conditions of a partnership approach and provision of personalised support, efforts to support and strengthen the capacities of lower SES parents to promote child development can be fruitful.