Tutoring Oral English to ESL Student?

A good way to start is to use authentic material like simple newspaper articles and other things that interest him, for example stories, stuff about computers etc. Make the lessons fun by using role-play and other games. For example when teaching him vocabulary you can use a ball that he must catch and everytime he drops it, he he has to say three or four related words to the one you gave him, or for spelling- let him spell them, or maybe have him use them in sentences. Use lots of pictures and have him talk, write, read and listen to something based on that article, story etc. As the former suggested, ensure that the 4 skills are used in every lesson. When he is speaking you can correct him but only if he is doing grammar. If he is expressing himself don't interrupt as it can undermine his conference and he may not want to speak. Instead take a note of what is incorrect and make a lesson of it another time. Remember the more practice he gets the more he will improve.