My website has a series of pages, each of which is an activity. Each activity has multiple tags, such as "with students" or "online" or "mutual respect". I'd like to create an index page where users can select a tag and see a list of which activities fit that criteria (and idea then be able to click and go to that page). I'd like some ideas of the best way to create this page, and ideally a link to somewhere that can get me started doing that. I'm also trying to figure out the best way to enter this data into a collection for this use. Is it cascading dropdown menus that then produce a table? Another way? Anyone have an example website where they've done this?