Federal Resources for Educational Excellence (FREE) - sometimes called Federal Resources for Excellent Education - provides teacher overviews/links to materials from the most popular primary/secondary school learning web sites. More than 1,500 federally supported teaching and learning resources are included from dozens of federal agencies.
The contributors' list is extensive, and includes the White House, the Internal Revenue Service, the Federal Bureau of Investigation, the National Institute of Standards and Technology and many others.
Note: these are not necessarily learning objects, just in many cases links. However this site is maintained, and to the extent that html can be used as a learning medium, this site allows that - and the content has been identified by subject and made searchable.
This is like a small, well-organised US agency internet, designed for classroom use.
It is among the most popular K-12 websites maintained by the US Department of Education.
Original funding came from the Government Information Technology Services Board (GITSB) Innovation Fund. It was conceived in 1997; and re-launched in 2006.
Its web site is at http://www.free.ed.gov