Resources for the Greek Language
On this page you fill find free resources, though it is better to have the books, for learning the Greek Language from the Athenaze series. Why not Koine instead of Attic? Simply because the Reformers learned Attic before specializing in Koine. That is how you achieve mastery.
This course is broken into two books. At the Scribd links you will also find many of the other books that are part of this course. To the side you will find links for study materials and audios for practice.
Use the Biblical Greek Athenaze link to find study helps for the Athenaze series.
I would recommend beginning the Language Transfer course, which is free, before the Athenaze series.