This LiveBinder has a great collection of math word problems for 6th graders. Includes worksheets, links to pdfs and some background as to the development skills that are being taught to 6th graders.  There are also some interactive websites, so students can answer problems online without having to print the worksheets.

Also contains math word problems for 5th and 7th graders to help with different developmental styles.  Skills they work on are recognizing patterns and algebra, data management and algebra, data management and probability, number concepts, geometry and measurement, estimation, solving proportions, logic, fractions and practice for standardized tests.

Just click on the tabs above to view the different websites.