The intervention program, called "Weight-Wise", consists of a four-month weight loss intervention phase, and a one-year maintenance phase. During the weight loss intervention, participants are offered 16 weekly group education sessions taught by a health counselor. The study goal for weight loss during this period is 10 or more pounds. Each session lasts about 120 minutes and includes the following elements: participant weigh-in, group sharing and problem-solving, discussion of a weight control topic (nutrition, physical activity, or behavior change), moderate physical activity and/or taste-testing. Study participants who complete the weight loss program and lose 8 or more pounds will be eligible to continue in the maintenance phase of the intervention. During the 1-year maintenance phase (which will start at the end of the weight loss phase for both SI and DI), participants in the SI group will receive 1 individual face-to-face contact with the health counselor, 8 monthly phone contacts, and 3 group sessions. The DI group will receive 1 individual face-to-face contact and 11 phone contacts from the health counselor during their maintenance intervention. After the weight loss phase and after 6 and 12 months of the maintenance intervention, both SI and DI participants will return to the clinic for follow-up data collection.