This study focused on TSE from combustible cigarettes, cigars, and pipe tobacco smoked in children's homes, which did not include the assessment of exposure to noncombustible tobacco products such as electronic cigarettes (e-cigarettes). We hypothesized that when compared to children with no home TSE (ie, did not live with a household tobacco smoker), children exposed to home THS exposure only (ie, lived with a household combustible tobacco smoker who did not smoke inside the home) and home SHS and THS exposure (ie, lived with a household combustible tobacco smoker who smoked inside the home) would be less engaged in school and have higher factors indicative of school success challenges (eg, miss ≥1 school day). Another study objective was to assess the associations between child home TSE status and participation in afterschool activities overall, and by activity type including sports teams or lessons, clubs or organizations, and other activities or lessons (eg, music, dance). We posited that when compared to children with no home TSE, children with home THS exposure only and children with home SHS and THS exposure would be less likely to participate in afterschool activities overall and by activity type. (author abstract)