How often do you have labs? I remember having them pretty often in HS, but there seems to be a variety of answers on the threads I've read here. CCSS-WV says a student should "engage in active inquiries, investigations and hands-on activities for a minimum of 50% of the instructional time." This seems excessive, IMO. We didn't even do that in college and I majored in Biology! I'm thinking 4-5 labs over the course of a 9 week semester? Some might be demo labs, or easy ones like examining pre-made slides under a microscope. I suppose it also depends on the budget the school has; I'm looking at very low income areas, so I'm not even sure what resources would be available.
50 percent is excessive. clearly written by someone who has not taught a high school science course! However, you quote does not say 50% of the course should be LABS. A hands-on activity could be using models, creating models, playing a matching game with vocab, etc." I would NEVER cover the standards in half the semester.
