This product entirely in French from Chez Nathalie is a unit on the immune system divided into two parts: organs, cells, function AND illnesses, vaccines, treatments. There is a wide variety of information, diagrams, activities and answer keys as well as several evaluations: three experiments, a quiz and a unit test.Each part is also sold separately. Part I sells for $8.50 and part II sells for $5.50. Part I:Immune System (organs, etc.)Partie II:Immune System (illnesses, etc.)Specifically, this