Fact 1: Only 10+ days earns a year toward your 85 factor

To gain one qualifying year in the pension plan, you need to work more than 10 days in the school year. Qualifying years, combined with your age, determine when you're eligible to receive an unreduced pension. Once you reach your 85 factor (age + qualifying years = 85), you can retire with an unreduced pension. Because of changes in the pension plan, there are different rules for measuring your qualifying years.

For the school years
Days of work needed for one qualifying year
After December 31, 1996 More than 10 days
September 1, 1990 to December 31, 1996 More than 20 days
Before September 1, 1990 Any credit

There's an important exception to how we measure qualifying years. If the first or last year of your career is a partial year, you'll receive credit for only the portion of the year worked. For instance, if you began your career halfway through the school year, you would receive one half-year of qualifying service for that year of teaching.