Standard errors for table 2: Average age, average years of experience, percentage female, percentage out-of-field, percentage with both a major and certification in field, and percentage working full time for public and private K–12 teachers, by employment background: 1999

Table SA5

Standard errors for table 2: Average age, average years of experience, percentage female, percentage out-of-field, percentage with both a major and certification in field, and percentage working full time for public and private K–12 teachers, by employment background: 1999–2000

Employment background	Average age	Average years of teaching experience	Percent female	Percent teaching out-of-field	Percent with both major and certifica- tion in main assignment field	Percent full time

All teachers	0.1	0.1	0.3	0.2	0.4	0.2
Continuing teachers	0.1	0.1	0.3	0.2	0.4	0.2
Transfers	0.2	0.2	0.9	0.8	1.1	0.9
Returning teachers	0.3	0.3	1.1	1.4	1.4	1.5
Delayed entrants	0.5	0	1.8	2.1	1.8	1.3
Recent graduates	0.3	0	1.7	1.5	1.9	1.0

SOURCE: U.S. Department of Education, National Center for Education Statistics, Schools and Staffing Survey (SASS), “Public Teacher Questionnaire,” “Charter Teacher Questionnaire,” and “Private Teacher Questionnaire,” 1999–2000.