Some senators said they supported a bill to allow retired teachers to return to the classroom, but there were too many unanswered questions about how the measure would affect the Public Employees Retirement System.
A retirees' association distributed fliers saying the bill would have endangered the financial security of the retirement system.
On a voice vote, senators sent the bill back to a committee, a parliamentary move that killed the bill on a deadline day.
Sen. Videt Carmichael of Meridian, a former educator, co-authored the bill.
The measure stated that, after a retired teacher returns to the job, the teacher's school district would pay into the retirement system but the teacher would not.
In every other case, both the employee and the employer pay into the system.