I received 5k from work for tuition reimbursement in Jan 2017 for Fall 2016 semester. I'll get 5K in May2017 for Spring. How do I report this?

I'm a full time student in Massachusetts and I'm making $55,000 before taxes. The refunds I'm receiving are not taxed. I'm confused on what to do since my first refund was for 2016 semester..although I received the money in Jan 2017?