The Lowes

We have lived in France for three years with our 15 year old son.  He has been in the French state school system since the age of 12 and has coped exceptionally well, passing his Brevet this year.  Unfortunately, he struggles with the maths and therefore the physics too and sadly, this year,(seconde) it is beyond our capabilities to help him!! Is there anyone who can help or offer advice?  Ideally we would like someone to review the work covered in class each week with him to make sure he understands and is not left behind.  We live in departement 32 (Gers), nr Lectoure but would be willing to travel if necessary. Thanks very much