I hope she's not a math teacher!

Absolutely. An adaptation is an adaptation, there are always going to be changes when you translate a work to an entirely new medium. A direct point for point translation almost never works. And you have to consider the audience, which is again going to be different from that of the original.

All media is a product of the cultural context in which it was produced. Even the most faithful adaptation still reflects those choices, and what the creators were trying to say. So an adaptation that updates some things and shifts a few others around in order to both make it a watchable product and to make it palatable and relevant to a modern audience is both something to be expected, and probably a better show than one that fails to consider either of those things.