I agree that the Math Glossary is similar in style to a portal (I do like the idea of Brent Simpson's portals -- not sure how to handle the biology content).
I'm suggesting creating a category for just the Math Glossary, because currently all of the MathGloss pages are included in Category:Glossary and Category:Mathematics. As it is the math gloss pages are overrunning these categories, and these pages are only going to get more numerous. Seemed like creating a subcategory for the Math Glossary would be a good thing.
The main page of the glossary can be more of a portal (if we'd like), I'm interested in creating a specific category for the subpages.
You may want to check the change that I am making to my page http://www.wikieducator.org/K-12math.info_%28English_-_Espa%C3%B1ol_%E2%80%93_Fran%C3%A7ais%29 . The section at the bottom of the page is the direction I am going for the whole page. Live links to supporting information have been set up for the first entries in the Subect and Grade level sections.