My name is Jen. I am Canadian from Quebec with a French father and British mother. One thing you can do is tell him that the grammar in English is not so strict (for speaking). Many of our words come from the same place so guessing the meaning is OK. What does the word mean in French? What do you think it might mean in English? Mostly, they are very close. I suggest (depending on the age) Sesame Street - an American PBS TV show that is all about teaching English in an easy, understandable way and fun! (another thing that is common in Eng and Fr teaching). Find some links he can use and enjoy and you will find his Eng lang ability will improve quickly. Another good site, though it costs money, is EdHelper.Com. Good reading and reading comprehension. Reading aloud is a great way to have  Ss practice the words. Cheers :)