Hello Kameel! My name is Lisa Krueger and I am a Khan Academy Ambassador teaching in Chicago. I am glad to hear you are interested in using Khan Academy to help your son master math skills. The site is an online curriculum designed to provide support through videos and hints to help students master grade level math skills. However, there are no coaches available to act as a one-on-one tutor for users. I would start with his teacher to see if they are using Khan Academy or you can set up and account for your son if he is under 13. I can give advice on which missions to start depending on age as well as recommend ways to use KA at home. Hopefully, this helps. Please let me know if you need further assistance. Thank you for posting.