I looked at the math too, but figured any extra money with regard to interest rate, was justified by considering the extra money spent as education expenses. (getrichslowly.org)
In regards to interest rates, carefully assess the impact of choosing a fixed or variable rate. (studentloanhero.com)
The debt snowball technique advises people to list their debts according to the outstanding balances and pay them off from the lowest balance to the highest balance without regard to interest rates. (treesfullofmoney.com)