CK-12 Foundation
Ck 12: Life Science: Theory of Evolution by Natural Selection
[Free Registration/Login may be required to access all resource tools.] Do you ever wonder why some birds are big like ostriches and some birds are small like robins? Or why a lion has a mane while a leopard has spots? In the 19th...
Study Languages
Study Spanish: Las Tortugas De Caparazon Gigante
This site has a cultural explanation in Spanish or English with a few comprehension questions aboutthe giant domed tortoises living on Ecuador's Galapagos Islands. Great reading selection for beginning and intermediate Spanish students.