Middle Schools

Moneyopolis from Ernst & Young has interactive game that use math and social studies,
register required, based on the NCTM standards.
Jump Start Coalition is for teachers.
Money Math: Lessons for Life is for teachers.
Teen Analyst helps teens invest in stocks.
Gazillionaire is a cross between Monopoly set in outer space and Wall Street in wonderland
Main Exchange a stock market game for children

High School Students

Professor A's Scholarship Guidance and Other Good Stuff 
21 tips: Save big $$ on college
FinAid.org has detailed formation about aid, loans, saving for college, scholarships ...
National Endowment for Financial Education for students, teachers
It All Adds Up teaches personal finance management skills covering credit cards, cars, budgeting, saving and investing and college.
Sense &Dollars from Maryland PBS covers budgeting.
High School Personal Finance from Junior Achievement
Money Smarts from the Girl Scouts is comprehensive and well done.
Money Talks from U.of California is well done in English and Spanish.
Checking Account Math  covers the basic and advanced topics like selecting  financial institution, checking accounts much more.
College Planning Calculator from AG Edwards
Best Values in Public Colleges - Kiplinger.com
Feed the Pig - CPA funded website to teach young people about their finances