TJ -- dont be afraid to build your own cirriculum until  or if you find another curriculum you like. 
I found this website by looking at the bottom of my sons worksheet from school
www.superteacherworksheets.com
The lower levels are free; the upper levels are not BUT you can see enough to work around the marked out areas.  Looks like middle school level.
( I didnt ck the link -- let me know if it isnt working.)
Older son is working on a 5 million years in the future project in science.  THey use a questionaire to create a future environment, and then resesign an animal to evolve to 5 million years into the future, with another question aire to help the student look at the changes like teeth, feeet, fur etc. THEN write a 1-2 page essay to describe the new environment and animal adaptations.
Makes a student use a variety of skills for one project. My son is loving it.