Math-Aids.Com is a free Web 2.0 tool. This site allows you to generate math worksheets on a variety of topics.
This is one of the best interactive and all-in-on websites on money/financial literacy. There are lessons, resources, and interactive activities. This can be used when completing whole group instruction in a lower-level course. Students and the teacher can collectively work on how to correctly fill out checks and registers.
This is a site for students to practice certain skills. It's broken down by grade level or subject. It is then broken down in particular skills and standards. This would be great for students practice on any class-related skill.
This is a site that has real-world math lessons. This is great for any lower level middle level or high school level math class. There is a great lesson on coupons and sales, the students need to determine which is better.