The biggest challenge of using an online tutoring service is communication. In addition to the technical limitations, you can't get the personal touch of face-to-face tutoring. The process is less effective when it is not possible to connect with the learner in person. You can still send and receive messages through email, but you can't see the other person, which can make it difficult for the student to learn. If your child is shy, however, you might not feel comfortable submitting assignments online.