English conversations to improve english level for our kids

We have three kids, one girl 14, one boy 12 and one 6. They used to be in a bi-lingual school, so they have a goof english level; We are looking for a good english speaking student (ideally native english speaking) to come to our house 2 to 3 hours a week (Wednesday lunch time could be a perfet timing). We live in Bron and we are 10 minutes away from metro Laennec or 5 minutes from Les Iris.

Thanks to contcat us through our email

Caroline & Benoit