Envisioning Better Math Searching, Part II
A parent wants to help a child do a project on fractals. There are 518,000 Google hits on "fractals", and while a few of them were appropriate, most were just pictures, or too advanced, and it was heavy going with a 5th grader.
By switching over to the Eisenhower National Clearinghouse, and searching for reviewed internet lessons for grades 3-6, they located 10 excellent resources in just a few minutes.
This is an example of a math-aware metadata search: Enter a search term along with criteria, and see what documents meet them.
Challenges: creating the metadata and controlled vocabularies