In this study, children ages 1-12 years old, who have clinically diagnosed tinea capitis, will all be prescribed oral griseofulvin for 8 weeks. In addition, they will be randomly assigned to use either selenium sulfide shampoo, ketoconazole shampoo, ciclopirox shampoo, or baby shampoo twice a week for 8 weeks. After 8 weeks, griseofulvin will be stopped. All patients will continue using the same assigned shampoo twice weekly for 24 weeks, while continuing to return to clinic every 4 weeks for scalp evaluation.