When trying to achieve healthy behaviors, here is what we measure
Increased knowledge: Kids need to be equipped with information to make good choices. They may have no idea that certain behaviors put their health at risk, and different people and communities have different perceptions (and misperceptions) about health. By giving kids accurate information, you're helping them to make healthy choices for a lifetime.
Improved attitude: All the information in the world won't help if kids don't believe changing behavior is important. We're making sure kids and their parents see these issues as relevant to them.
Increased self-efficacy: Finally, kids have to believe they can really pull off these healthier behaviors. Part of that comes down to designing interventions that can work for them in their circumstances. The rest of it is instilling in kids the confidence and belief to keep it up.