1.) federal subsidized student loan, your child can take this on his own w/ government subsidized interest payment while he’s in school. There is a certain loan limit to this and no-cosigner is needed.
2.) parent plus loan, you take the loan for your child and pay it on your own.
3.) Private student loan, higher interest rate and no government help, you can cosigned it with your child on this one. However, if he defaults on his payment, you have to pay for it.
Above all, there is no escape on student loans, you can’t eliminate it even in bankruptcy. Once you borrowed, you have to pay it back.