You can find any events/open houses that schools have submitted to GoCPS here: Calendar of Events (cps.edu)
If you expand the “Filter Tags” section on the left-hand side of the page, you can narrow down to just High School Open Houses or Elementary School Open Houses.
From what I remember from last year, some schools only posted their open house/tour info on their own website. I’m almost certain that was the case for Bell, and I feel like there were at least a couple others, but I can’t remember which ones.