This method will require a sharp knife, gloves, ski mask, tarp, shovel, transportation to undisclosed location *cough W:H's house cough*, and the willingness to take a human life.
Only kidding.
Well, despite your or his age, you deserve your privacy and time for yourself. Simply tell him that you cannot do or teach him anything right now, but later you will. If need be, talk to his parents, I'm sure they'll understand (they are around him more than you are

) and can help you out.
C=B