Preventing Physical Impairment in Childhood CBM Strategy Overview | Laminated flip charts | These are the main implementing tools in the prevention program, developed as A4 sized booklets which can be carried easily. They constitute the basic information a community rehabilitation worker needs to convey to caregivers, primary health providers and other appropriate user groups. They are primarily visually presented, taking into consideration audiences with limited literacy, with three or four bullet points per page for the community workers to reinforce. The drawings can also be printed on A1 sized flip charts.