I fully agree on phonics, but teaching Greek and Latin before any modern language? That seems deeply weird as an idea. Especially since Greek (by which I assume you mean Ancient Greek) is a pretty isolated language, with relatively little relation to any modern language except modern Greek. Another huge issue with Ancient Greek and Classical Latin is that they have extremely complex grammars compared to any modern European language, which makes them very daunting to English speakers especially.
Note also that Greek words used in English are almost exclusively scholarly words (like "metaphor", "diagnosis", "theology"), they are not popular borrowings like many Latin words ("difficult", "pork", "to count").
Note also that Greek words used in English are almost exclusively scholarly words (like "metaphor", "diagnosis", "theology"), they are not popular borrowings like many Latin words ("difficult", "pork", "to count").