This is exactly how the lie about the validity of evolution has been perpetuated. This teacher, I am sure, did not intend to indoctrinate her students into evolutionary thinking. She did, however, in ignorance, help in promoting a lie. Biology teachers and English teachers, for the most part, teach from two sources. First, they teach what they were taught as truth in college, and second, they teach from whichever textbook their students are using.
All textbooks used in public schools treat evolution as fact.
I wish it were that easy. It seems that requirement is a little like demanding Ben Franklin, who knew about electricity, to hurry up and invent the light bulb. Real science works a little at a time and the number of scientists on our side is few. On the other hand, we can without a lot of extra research point out the difficulties and indeed outright lies that modern evolutionary theory is getting away with. Evolutionary naturalism and biblical naturalism are both basic philosophies which look at the same natural phenomena and arrive at different conclusions.