If the church bazaar is offering a handmade quilt, photograph someone sewing on it. Focus on one or more children for Sunday School photos. Several people in a shot is better than 10 or 20. Film is cheap Shoot lots of pictures because people get more relaxed as the photo session moves on. Your prints should have a glossy finish.
Photos gain definition when reduced and lose it in enlargement.
If you have a choice, send in a larger print-the paper can reduce it to fit their layout. Provide a full caption with names for each photo you submit. Tape or paste the photo to a sheet of paper and put the caption on the portion that folds down. This way, the photo and caption can be seen together. Type it out so the names will be spelled correctly.