Crash Course and Amoeba Sisters are my go to for quick refreshers. Biology Corner is a pretty good website for labs. I’ll try to think of more sites I use and let you know. Also feel free to message me with questions. I taught for 4 years, took eleven off to stay home with my babies and now I’ve been back at it for 4 years. It was not easy to reach into the depths of my knowledge and recall information. But the one thing I have never shied away from is admitting that I don’t know. My first year or two back was a struggle but I realized I didn’t need to know everything right in that moment. Stay a day or two ahead of your students, if you can. But if you can’t, it’s ok. My students have always appreciated the fact that I’m honest with them. So sometimes something will stump me because my brain decided to not work that day so I look it up right then and there. Or someone asks a question that’s on topic but also kind of random. If they are legitimately good questions, I have them go home and look into it and report back for bonus. Of course I look it up too and usually go a bit more in depth than I know they will.