If you need ideas for physical activity, check out the book: The Ultimate Homeschool Physical Education Game Book, by Guy Bailey, a veteran PE teacher who adapted traditional PE activities to become family-sized games, allowing you to teach physical education in the home setting. I also recommend checking outThe Nutrition Source: Knowledge for Healthy Eating, maintained by Harvard School of Public Health. They have designed a healthy eating pyramid to be used in place of the FDA's food pyramid, because that one was created by people with strong business interests in its message. This pyramid is reflective of up to date science knowledge and was made by people with no stake in its message, other than trying to promote public health. The have quite a bit of basic nutrition education available online through the site as well.