The Divine knowledge of Hindu (Bhartiya) scriptures could have benefited the aspirants of God of the whole world. But, the diplomats of the British, who were ruling India in those days, clouded this opportunity by extensively launching their deliberate false propagation about India and its universal Hindu religion, and not only that, they degraded Hindu culture by all means, and thus, hampered the spiritual growth of the whole world. A fair example is the Encyclopaedia Britannica of 1854 itself in which they fed such derogatory statements about Hindu (Bhartiya) religion.
So, whether your child goes to International School or Govt. School in slum of metro, State board, Central board, whatever; do teach them Gita, Mahabharata, Ramayana, Purana. Spiritually empty-bellied child is just little better than unfortunate Autistic child or malnourished child.