Yes, you can contribute to an IRA as long as you have earned income past what you put in your 403(b) accounts. For a married couple, deductible traditional IRA contributions have a $98k MAGI limit (2015), Roth IRA contributions have a $183k MAGI limit, and non-deductible traditional IRA contributions can be done at any income level. This latter type is probably only a good idea if you plan to convert the balance to Roth soon (aka "backdoor Roth contributions").