Where was the word homework made?

There's no single place or time the word "homework" was "made" in the sense of being invented. It evolved organically from the combination of "home" and "work." While pinpointing the exact origin is impossible, its usage became more common in the late 19th and early 20th centuries as formalized schooling expanded in English-speaking countries. So, there's no specific country or location to credit with its creation.