You and your first grader have been working hard learning to spell words. Now it is time to teach your child about putting words in ABC order.
A good mix of worksheets, hands-on activities, and games work well to accomplish teaching alphabetizing. ABC games can be games you make up or online educational ABC games. Most first graders benefit from learning to alphabetize up to the second letter or third letter. If your child has a hard time, just teach them to go to the second letter for now. There is plenty of time to master this skill, and it is practiced each year in subsequent years in most elementary homeschool curriculum programs.