Today's free resource over at Homeschool Freebie of the day sounds interesting for homeschool and classroom students and teachers alike. Also of note if you enjoy travelling, geography, math etc. but are out of schooling. :)
As Jim Erskine puts it: "MATHEMATICAL GEOGRAPHY (PDF ebook) is a great reference text on how Geography and Mathematics work together, with chapters on the form & rotation of the earth, latitude and longitude, time and the calendar, math & tides, the earth in space, and more. Very well done vintage illustrated reference book, with loads of great info for curious students and advanced math & geographic study. The appendices and glossary alone are amazing in this!"
To get yours go here: http://www.homeschoolfreebie.wholesomechildhood.com/mathematical-geography/