I wasn't really blown away with this series opener. As someone who loves anthology TV shows (particularly ones from the 90's), I was quite excited to see this episode, but by the halfway point, I was slowly losing interest. The 'brain-washing boarding school' premise has been done to death in recent years, and it's something I've seen countless times before in other horror based shows for kids. Are You Afraid of the Dark did its own version of this with "The Tale of the Hatching" in the early 90's. Goosebumps, too, attempted the exact same plot with "The Perfect School" a few years later. These two stories entertained me more than "Leave Them Kids Alone" unfortunately.
The story was also played too straight. No twists or plot developments that could've made this episode stand out from other versions of this tale, which is a shame. Just nothing memorable or new. Mckenna Grace, though, was solid and relatable as the lead, and I wish more was done with her character.
Still, it was a piece of clean entertainment for the whole family, which gives it some points. However, if you're looking for a better executed telling of an evil boarding school story, try elsewhere. Leave this episode alone!