I "love" Quia and so do my kiddos! I have a paid subscription and have kept it for a number of years. If you see something on my site, either grab it from my site or link to my site for your students.
"Curriculum 21 is the outgrowth of the work of a dynamic group of educators worldwide attempting to help colleagues transform curriculum and school designs to match the needs of 21st century learners. The impetus origniated from the Curriculum Mapping work developed by Dr. Heidi Hayes Jacobs. As we examined maps emerging across the United States and overseas it was evident that curriculum and instruction remains dated although both students and teachers recognize the need to become current and forward thinking in our planning. Concrete and practical models for updating your school programs appear in her upcoming book, Curriculum 21: Essential Education for a Changing World, with ASCD, to be released in January, 2010."