Skip Navigation
small NCES header image
Projections of Education Statistics to 2020

NCES 2011-026
September 2011

Table C.  Mean absolute percentage errors (MAPEs) of projections of number of public elementary and secondary school teachers, by lead time: 2011

Statistic Lead time (years)
1 2 3 4 5 6 7 8 9 10
Public elementary and secondary teachers 1.0 1.4 1.7 2.3 2.9 3.4 4.1 4.4 5.1 5.9
NOTE: MAPEs for teachers were calculated from the past 20 editions of Projections of Education Statistics containing teacher projections. Calculations were made using unrounded numbers. Some data have been revised from previously published figures.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Projections of Education Statistics, various issues. (This table was prepared March 2011.)

Would you like to help us improve our products and website by taking a short survey?

YES, I would like to take the survey


No Thanks

The survey consists of a few short questions and takes less than one minute to complete.