I shall offer the dreaded disclaimer "I am new to WordPress" so you know what follows will probably be gibberish.
I would like to post some mathematics activities and tag them with two types of tags:
1. Level - easy, medium, hard, ...
2. Subject - angle, trigonometry, calculus, ...
Then when someone clicks on a tag, say "easy", in the tag cloud I would like a list of all the posts that included the tag "easy".
Fantastic so far!
What I would really like at this point is for the tag cloud to update so it only displays tags that are on the same posts as the tag "easy", what I have called relative tags, but if they have another name please correct me. If the user now clicks on one of these relative tags, say "angle", I would like the list to update, not to show all the posts tagged with "angle" but all the posts tagged with "easy" and "angle".
The blog I need help with is mathsgymnasium.wordpress.com.