Original sentence: Devoted spelling bee participants also use other reference books, which feature strategies, methods and lists to help the contestant further develop their spelling skills.Tutoring materials to aid spelling skills are also becoming available on the web
Edited sentence: In addition, devoted spelling bee participants may purchase How to Spell Like a Champ, which may be purchased through various bookstores across the United States.The book features strategies/methods and lists which will help the contestant further develop their spelling skills