Skip Navigation
Digest of Education Statistics
2020 Tables and Figures All Years of Tables and Figures Most Recent Full Issue of the Digest


Table 209.10. Number and percentage distribution of teachers in public and private elementary and secondary schools, by selected teacher characteristics: Selected years, 1987-88 through 2017-18
[Standard errors appear in parentheses]
Selected teacher characteristic Number of teachers (in thousands) Percentage distribution of teachers
1987-88 1990-91 1999-2000 2003-04 2007-08 2011-12 2015-16 2017-18 1987-88 1990-91 1999-2000 2003-04 2007-08 2011-12 2015-16 2017-18
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
Public schools                                                                      
Total 2,323   (13.2) 2,559   (20.7) 3,002   (19.4) 3,251 (29.2) 3,405 (44.0) 3,385 (41.4) 3,349 (28.7) 3,545 (23.5) 100.0 (†) 100.0 (†) 100.0 (†) 100.0 (†) 100.0 (†) 100.0 (†) 100.0 (†) 100.0 (†)
Sex                                                                      
Male 685   (6.8) 719   (11.2) 754   (10.7) 813 (13.3) 821 (20.4) 802 (22.2) 776 (12.5) 834 (11.6) 29.5 (0.22) 28.1 (0.31) 25.1 (0.30) 25.0 (0.32) 24.1 (0.47) 23.7 (0.49) 23.2 (0.33) 23.5 (0.28)
Female 1,638   (10.1) 1,840   (14.7) 2,248   (16.0) 2,438 (23.5) 2,584 (34.6) 2,584 (30.5) 2,573 (25.2) 2,712 (20.2) 70.5 (0.22) 71.9 (0.31) 74.9 (0.30) 75.0 (0.32) 75.9 (0.47) 76.3 (0.49) 76.8 (0.33) 76.5 (0.28)

Race/ethnicity
                                                                     
White 2,018 1 (12.6) 2,214 1 (20.0) 2,532 1 (17.2) 2,702 (30.1) 2,829 (38.7) 2,773 (30.5) 2,694 (25.9) 2,811 (22.7) 86.9 (0.24) 86.5 (0.29) 84.3 (0.30) 83.1 (0.53) 83.1 (0.53) 81.9 (0.53) 80.4 (0.33) 79.3 (0.35)
Black 191 1 (4.6) 212 1 (6.4) 228 1 (6.0) 257 (11.0) 239 (15.8) 231 (12.1) 224 (7.2) 239 (7.4) 8.2 (0.19) 8.3 (0.25) 7.6 (0.19) 7.9 (0.34) 7.0 (0.45) 6.8 (0.31) 6.7 (0.21) 6.7 (0.20)
Hispanic 69 1 (2.6) 87 1 (4.5) 169 1 (6.4) 202 (11.3) 240 (16.6) 264 (13.4) 289 (7.6) 331 (9.2) 3.0 (0.11) 3.4 (0.17) 5.6 (0.20) 6.2 (0.34) 7.1 (0.46) 7.8 (0.37) 8.6 (0.21) 9.3 (0.26)
Asian 21 1,2 (1.1) 27 1,2 (1.7) 48 1,2 (2.7) 42 (2.5) 42 (7.2) 61 (7.3) 72 (3.1) 75 (3.5) 0.9 (0.05) 1.0 (0.06) 1.6 (0.09) 1.3 (0.08) 1.2 (0.21) 1.8 (0.21) 2.2 (0.09) 2.1 (0.10)
Pacific Islander ---   (†) ---   (†) ---   (†) 6 (0.8) 6 (1.3) 5 (1.4) 7 (0.9) 8 (1.0) --- (†) --- (†) --- (†) 0.2 (0.03) 0.2 (0.04) 0.1 (0.04) 0.2 (0.03) 0.2 (0.03)
American Indian/
     Alaska Native
24 1 (1.3) 20 1 (1.4) 26 1 (1.9) 17 (1.2) 17 (1.9) 17 (2.9) 15 (1.4) 18 (1.7) 1.0 (0.06) 0.8 (0.05) 0.9 (0.06) 0.5 (0.04) 0.5 (0.06) 0.5 (0.08) 0.5 (0.04) 0.5 (0.05)
Two or more races ---   (†) ---   (†) ---   (†) 24 (2.2) 31 (2.9) 35 (3.7) 46 (2.4) 63 (3.1) --- (†) --- (†) --- (†) 0.7 (0.07) 0.9 (0.09) 1.0 (0.11) 1.4 (0.07) 1.8 (0.09)

Age
                                                                     
Under 30 313   (5.0) 257   (5.7) 509   (9.2) 540 (27.4) 612 (22.4) 518 (15.9) 505 (8.7) 531 (9.4) 13.5 (0.19) 10.0 (0.23) 17.0 (0.28) 16.6 (0.84) 18.0 (0.61) 15.3 (0.44) 15.1 (0.23) 15.0 (0.24)
30 to 39 823   (7.7) 684   (10.8) 661   (9.8) 798 (14.5) 898 (16.8) 979 (19.3) 955 (12.9) 991 (12.9) 35.4 (0.30) 26.7 (0.35) 22.0 (0.29) 24.5 (0.38) 26.4 (0.39) 28.9 (0.53) 28.5 (0.29) 27.9 (0.29)
40 to 49 762   (7.4) 1,034   (13.3) 953   (10.3) 840 (14.3) 808 (19.2) 849 (19.2) 918 (12.2) 1,028 (12.3) 32.8 (0.25) 40.4 (0.37) 31.8 (0.32) 25.9 (0.38) 23.7 (0.47) 25.1 (0.51) 27.4 (0.28) 29.0 (0.32)
50 to 59 357   (5.7) 477   (8.6) 786   (12.6) 942 (26.0) 879 (21.1) 783 (20.5) 719 (10.8) 732 (11.6) 15.4 (0.23) 18.7 (0.29) 26.2 (0.35) 29.0 (0.74) 25.8 (0.51) 23.1 (0.49) 21.5 (0.24) 20.7 (0.29)
60 and over 68   (2.5) 107   (4.1) 93   (4.0) 131 (4.8) 207 (10.3) 256 (13.2) 252 (5.6) 263 (6.1) 2.9 (0.11) 4.2 (0.16) 3.1 (0.13) 4.0 (0.14) 6.1 (0.29) 7.6 (0.34) 7.5 (0.17) 7.4 (0.17)

Highest degree earned
                                                                     
Less than bachelor's 15   (1.0) 17   (1.2) 20   (1.3) 35 (2.5) 27 (2.1) 128 (8.6) 82 (3.5) 97 (3.6) 0.7 (0.04) 0.7 (0.05) 0.7 (0.04) 1.1 (0.08) 0.8 (0.06) 3.8 (0.24) 2.5 (0.10) 2.7 (0.10)
Bachelor's 1,214   (9.8) 1,327   (11.7) 1,560   (15.8) 1,651 (22.8) 1,612 (28.8) 1,350 (21.1) 1,364 (16.0) 1,393 (15.8) 52.3 (0.28) 51.9 (0.31) 52.0 (0.40) 50.8 (0.56) 47.4 (0.59) 39.9 (0.52) 40.7 (0.35) 39.3 (0.36)
Master's 932   (8.5) 1,077   (13.5) 1,257   (13.9) 1,331 (21.7) 1,517 (27.8) 1,614 (29.1) 1,580 (18.1) 1,744 (17.5) 40.1 (0.30) 42.1 (0.34) 41.9 (0.38) 40.9 (0.56) 44.5 (0.55) 47.7 (0.57) 47.2 (0.35) 49.2 (0.36)
Education
     specialist3
146   (3.4) 118   (5.3) 143   (5.2) 195 (6.8) 218 (8.6) 257 (9.7) 280 (6.7) 271 (6.8) 6.3 (0.14) 4.6 (0.20) 4.7 (0.17) 6.0 (0.19) 6.4 (0.25) 7.6 (0.27) 8.4 (0.18) 7.6 (0.18)
Doctor's 16   (1.2) 20   (1.7) 22   (1.8) 38 (3.5) 30 (2.7) 37 (4.0) 42 (2.5) 41 (2.5) 0.7 (0.05) 0.8 (0.07) 0.7 (0.06) 1.2 (0.11) 0.9 (0.08) 1.1 (0.11) 1.3 (0.07) 1.2 (0.07)

Years of teaching
    experience
                                                                     
Less than 3 145   (3.2) 185   (4.8) 325   (7.7) 339 (36.6) 392 (18.1) 244 (8.5) 333 (6.9) 318 (7.2) 6.2 (0.14) 7.2 (0.19) 10.8 (0.24) 10.4 (1.13) 11.5 (0.48) 7.2 (0.24) 9.9 (0.19) 9.0 (0.19)
3 to 9 568   (6.3) 596   (9.4) 854   (12.3) 1,043 (14.1) 1,125 (19.6) 1,104 (20.6) 948 (13.0) 1,003 (14.1) 24.4 (0.22) 23.3 (0.30) 28.5 (0.37) 32.1 (0.33) 33.0 (0.52) 32.6 (0.52) 28.3 (0.30) 28.3 (0.34)
10 to 20 1,072   (8.7) 1,056   (11.8) 865   (10.1) 946 (21.5) 1,017 (24.3) 1,265 (21.0) 1,314 (15.9) 1,416 (14.4) 46.1 (0.27) 41.3 (0.35) 28.8 (0.33) 29.1 (0.58) 29.9 (0.57) 37.4 (0.53) 39.2 (0.30) 39.9 (0.35)
Over 20 539   (6.1) 721   (10.6) 958   (13.5) 922 (27.9) 871 (23.9) 772 (23.8) 754 (10.3) 808 (11.8) 23.2 (0.23) 28.2 (0.30) 31.9 (0.36) 28.4 (0.81) 25.6 (0.62) 22.8 (0.54) 22.5 (0.26) 22.8 (0.29)

Level of instruction4
                                                                     
Elementary 1,292   (9.5) 1,442   (11.8) 1,602   (13.5) 1,716 (25.8) 1,725 (37.1) 1,726 (20.2) 1,690 (33.2) 1,779 (24.5) 55.6 (0.33) 56.3 (0.40) 53.3 (0.42) 52.8 (0.66) 50.7 (0.91) 51.0 (0.65) 50.5 (0.86) 50.2 (0.62)
General 788   (7.4) 887   (10.6) 1,042   (12.5) 1,130 (29.8) 1,100 (26.5) 1,078 (22.1) 1,033 (22.7) 1,097 (17.3) 33.9 (0.29) 34.6 (0.39) 34.7 (0.41) 34.8 (0.86) 32.3 (0.70) 31.8 (0.71) 30.9 (0.61) 30.9 (0.45)
Arts/music 116   (3.0) 110   (4.3) 99   (3.7) 101 (5.3) 103 (6.6) 82 (5.4) 96 (3.7) 99 (4.2) 5.0 (0.13) 4.3 (0.17) 3.3 (0.12) 3.1 (0.17) 3.0 (0.19) 2.4 (0.16) 2.9 (0.11) 2.8 (0.11)
English 60   (2.3) 72   (3.8) 66   (3.8) 70 (5.1) 104 (9.9) 92 (6.9) 123 (4.2) 117 (4.6) 2.6 (0.10) 2.8 (0.14) 2.2 (0.13) 2.2 (0.16) 3.0 (0.29) 2.7 (0.21) 3.7 (0.12) 3.3 (0.13)
ESL/bilingual 18   (1.1) 20   (1.3) 28   (1.8) 25 (3.6) 24 (3.3) 51 (6.8) 46 (2.7) 48 (3.4) 0.8 (0.05) 0.8 (0.05) 0.9 (0.06) 0.8 (0.11) 0.7 (0.10) 1.5 (0.20) 1.4 (0.08) 1.4 (0.10)
Health/physical ed 56   (2.0) 66   (3.2) 57   (3.5) 73 (5.0) 63 (6.0) 79 (8.1) 62 (2.9) 65 (3.5) 2.4 (0.09) 2.6 (0.12) 1.9 (0.12) 2.2 (0.15) 1.8 (0.18) 2.3 (0.23) 1.9 (0.08) 1.8 (0.10)
Mathematics 31   (2.0) 30   (1.9) 23   (2.4) 19 (2.3) 28 (3.8) 32 (6.5) 37 (2.3) 36 (2.3) 1.3 (0.09) 1.2 (0.08) 0.8 (0.08) 0.6 (0.07) 0.8 (0.11) 0.9 (0.19) 1.1 (0.07) 1.0 (0.07)
Science 18   (1.5) 21   (1.9) 11   (1.3) 19 (3.0) 15 (3.4) 18 (3.3) 23 (1.7) 23 (1.8) 0.8 (0.06) 0.8 (0.07) 0.4 (0.04) 0.6 (0.09) 0.4 (0.10) 0.5 (0.10) 0.7 (0.05) 0.6 (0.05)
Special education 168   (3.9) 176   (5.9) 227   (5.6) 240 (20.6) 230 (13.0) 239 (10.3) 218 (5.7) 235 (6.3) 7.2 (0.16) 6.9 (0.23) 7.6 (0.18) 7.4 (0.63) 6.7 (0.37) 7.1 (0.31) 6.5 (0.16) 6.6 (0.17)
Other elementary 37   (2.4) 60   (3.2) 49   (3.5) 40 (3.5) 58 (4.2) 55 (5.2) 52 (2.7) 60 (3.0) 1.6 (0.10) 2.4 (0.12) 1.6 (0.12) 1.2 (0.11) 1.7 (0.12) 1.6 (0.15) 1.5 (0.08) 1.7 (0.08)
Secondary 1,031   (10.5) 1,118   (16.5) 1,401   (17.7) 1,534 (26.0) 1,680 (39.0) 1,659 (37.8) 1,658 (31.4) 1,766 (25.2) 44.4 (0.33) 43.7 (0.40) 46.7 (0.42) 47.2 (0.66) 49.3 (0.91) 49.0 (0.65) 49.5 (0.86) 49.8 (0.62)
Arts/music 73   (2.0) 74   (2.3) 110   (3.4) 112 (4.1) 121 (6.2) 121 (5.6) 129 (4.1) 130 (4.5) 3.1 (0.09) 2.9 (0.08) 3.7 (0.11) 3.4 (0.12) 3.6 (0.18) 3.6 (0.14) 3.9 (0.12) 3.7 (0.13)
English 171   (3.2) 195   (5.1) 245   (5.1) 269 (9.0) 306 (10.0) 289 (9.9) 293 (6.3) 294 (6.6) 7.4 (0.12) 7.6 (0.18) 8.2 (0.15) 8.3 (0.27) 9.0 (0.27) 8.5 (0.25) 8.8 (0.18) 8.3 (0.18)
ESL/bilingual 6   (0.5) 10   (0.7) 16   (1.2) 18 (2.5) 21 (2.5) 20 (2.4) 22 (1.6) 24 (1.9) 0.3 (0.02) 0.4 (0.03) 0.5 (0.04) 0.6 (0.08) 0.6 (0.07) 0.6 (0.07) 0.6 (0.05) 0.7 (0.05)
Foreign language 43   (1.2) 52   (2.4) 71   (2.4) 73 (3.3) 78 (5.0) 88 (4.5) 80 (3.1) 85 (3.5) 1.9 (0.05) 2.0 (0.09) 2.4 (0.08) 2.3 (0.10) 2.3 (0.14) 2.6 (0.12) 2.4 (0.09) 2.4 (0.10)
Health/physical ed 76   (2.4) 76   (2.2) 99   (3.1) 102 (4.3) 119 (5.7) 101 (3.9) 94 (2.9) 97 (3.2) 3.3 (0.10) 3.0 (0.08) 3.3 (0.10) 3.1 (0.12) 3.5 (0.16) 3.0 (0.11) 2.8 (0.09) 2.7 (0.09)
Mathematics 139   (2.5) 155   (4.3) 207   (4.5) 213 (5.5) 252 (9.1) 250 (7.5) 242 (6.1) 265 (6.6) 6.0 (0.10) 6.0 (0.15) 6.9 (0.14) 6.5 (0.17) 7.4 (0.25) 7.4 (0.19) 7.2 (0.17) 7.5 (0.18)
Science 115   (2.9) 128   (4.0) 169   (4.0) 189 (6.8) 195 (8.3) 209 (6.1) 200 (5.0) 220 (5.6) 4.9 (0.11) 5.0 (0.15) 5.6 (0.12) 5.8 (0.20) 5.7 (0.24) 6.2 (0.16) 6.0 (0.14) 6.2 (0.15)
Social studies 118   (2.4) 124   (3.3) 163   (4.4) 178 (5.7) 209 (9.9) 197 (6.3) 200 (5.2) 214 (5.2) 5.1 (0.10) 4.8 (0.12) 5.4 (0.14) 5.5 (0.16) 6.1 (0.27) 5.8 (0.16) 6.0 (0.15) 6.0 (0.14)
Special education 100   (2.2) 113   (3.5) 113   (2.8) 174 (7.5) 165 (9.7) 191 (12.2) 179 (4.6) 199 (5.5) 4.3 (0.09) 4.4 (0.13) 3.8 (0.09) 5.4 (0.23) 4.9 (0.28) 5.7 (0.32) 5.4 (0.13) 5.6 (0.15)
Vocational/
     technical
166   (3.0) 160   (3.7) 161   (3.5) 169 (5.7) 164 (6.3) 147 (5.7) 150 (5.2) 139 (4.4) 7.1 (0.12) 6.3 (0.12) 5.4 (0.10) 5.2 (0.17) 4.8 (0.17) 4.3 (0.16) 4.5 (0.15) 3.9 (0.12)
Other secondary 25   (1.3) 30   (1.5) 47   (2.0) 36 (2.1) 47 (3.4) 46 (4.0) 70 (2.9) 98 (3.9) 1.1 (0.06) 1.2 (0.06) 1.6 (0.07) 1.1 (0.06) 1.4 (0.10) 1.4 (0.12) 2.1 (0.08) 2.8 (0.11)

Private schools
                                                                     
Total 307   (8.5) 356   (7.2) 449   (10.6) 467 (10.3) 490 (9.2) 465 (11.1) --- (†) 509 (9.1) 100.0 (†) 100.0 (†) 100.0 (†) 100.0 (†) 100.0 (†) 100.0 (†) --- (†) 100.0 (†)
Sex                                                                      
Male 67   (3.3) 82   (3.3) 107   (3.8) 110 (8.4) 127 (4.6) 117 (6.9) --- (†) 133 (4.1) 21.8 (0.86) 22.9 (0.74) 23.9 (0.48) 23.6 (1.93) 26.0 (0.78) 25.2 (1.33) --- (†) 26.0 (0.63)
Female 240   (7.2) 275   (5.8) 342   (7.7) 357 (14.3) 362 (7.7) 348 (10.1) --- (†) 377 (7.3) 78.2 (0.86) 77.1 (0.74) 76.1 (0.48) 76.4 (1.93) 74.0 (0.78) 74.8 (1.33) --- (†) 74.0 (0.63)

Race/ethnicity
                                                                     
White 285 1 (8.3) 329 1 (7.0) 402 1 (9.6) 411 (12.0) 423 (8.8) 411 (11.1) --- (†) 433 (8.3) 92.8 (0.50) 92.2 (0.46) 89.5 (0.42) 88.0 (0.99) 86.4 (0.80) 88.3 (0.69) --- (†) 85.1 (0.61)
Black 7 1 (0.8) 9 1 (1.0) 17 1 (1.4) 19 (2.9) 20 (2.2) 17 (2.4) --- (†) 16 (1.5) 2.3 (0.27) 2.7 (0.28) 3.7 (0.29) 4.0 (0.65) 4.0 (0.44) 3.6 (0.54) --- (†) 3.2 (0.29)
Hispanic 9 1 (1.1) 12 1 (1.0) 21 1 (1.5) 23 (3.1) 29 (2.1) 24 (2.4) --- (†) 37 (2.2) 2.8 (0.36) 3.3 (0.26) 4.7 (0.30) 4.8 (0.71) 5.9 (0.38) 5.2 (0.51) --- (†) 7.2 (0.43)
Asian 4 1,2 (0.8) 5 1,2 (0.6) 7 1,2 (0.6) 9 (1.0) 11 (1.5) 9 (1.4) --- (†) 14 (1.4) 1.2 (0.26) 1.5 (0.18) 1.6 (0.14) 1.8 (0.20) 2.2 (0.29) 1.8 (0.31) --- (†) 2.7 (0.27)
Pacific Islander ---   (†) ---   (†) ---   (†) (†) (†) (†) --- (†) (†) --- (†) --- (†) --- (†) 0.2 (0.07) 0.3 (0.14) (†) --- (†) 0.1 (0.04)
American Indian/
     Alaska Native
3 1 (0.4) 1 1 (0.3) 2 1 (0.4) (†) (†) (†) --- (†) (†) 0.9 (0.12) 0.4 (0.09) 0.6 (0.08) (†) (0.12) (†) --- (†) 0.3 (0.10)
Two or more races ---   (†) ---   (†) ---   (†) 3 (1.4) 4 (0.6) 4 (0.9) --- (†) 7 (0.9) --- (†) --- (†) --- (†) 0.6 (0.28) 0.7 (0.12) 0.8 (0.19) --- (†) 1.3 (0.17)

Age
                                                                     
Under 30 67   (2.6) 60   (2.2) 87   (3.1) 88 (3.7) 80 (3.9) 78 (6.8) --- (†) 83 (3.5) 21.8 (0.77) 16.7 (0.61) 19.3 (0.43) 18.9 (0.78) 16.3 (0.67) 16.7 (1.48) --- (†) 16.2 (0.65)
30 to 39 106   (3.6) 100   (4.0) 101   (3.2) 103 (5.8) 109 (5.2) 112 (6.2) --- (†) 124 (4.1) 34.5 (0.81) 28.1 (0.78) 22.4 (0.50) 22.0 (1.36) 22.3 (0.91) 24.0 (1.07) --- (†) 24.4 (0.66)
40 to 49 84   (3.4) 121   (3.1) 131   (4.2) 119 (7.1) 116 (3.6) 110 (6.3) --- (†) 115 (4.0) 27.4 (0.78) 33.9 (0.74) 29.2 (0.62) 25.4 (1.41) 23.8 (0.65) 23.8 (1.06) --- (†) 22.7 (0.68)
50 to 59 34   (2.2) 53   (2.3) 106   (3.2) 121 (11.1) 128 (4.5) 99 (5.0) --- (†) 108 (3.8) 11.1 (0.57) 14.8 (0.55) 23.5 (0.46) 25.8 (2.07) 26.2 (0.87) 21.3 (1.06) --- (†) 21.2 (0.64)
60 and over 16   (1.7) 23   (1.6) 25   (1.2) 37 (4.7) 56 (3.1) 66 (5.0) --- (†) 79 (3.4) 5.3 (0.49) 6.4 (0.41) 5.7 (0.24) 8.0 (0.99) 11.5 (0.62) 14.2 (1.05) --- (†) 15.5 (0.58)

Highest degree earned
                                                                     
Less than bachelor's 13   (1.4) 23   (1.6) 33   (2.3) 43 (21.5) 40 (2.9) 39 (5.2) --- (†) 51 (2.8) 4.4 (0.42) 6.4 (0.45) 7.3 (0.46) 9.2 (4.41) 8.1 (0.58) 8.4 (1.07) --- (†) 10.0 (0.53)
Bachelor's 189   (5.1) 221   (5.7) 258   (5.8) 259 (11.2) 264 (6.8) 225 (6.7) --- (†) 216 (5.3) 61.4 (0.75) 61.9 (0.90) 57.5 (0.64) 55.5 (2.90) 53.9 (0.95) 48.5 (1.37) --- (†) 42.4 (0.83)
Master's 92   (3.8) 96   (3.1) 136   (4.5) 138 (6.1) 161 (5.3) 166 (7.5) --- (†) 204 (5.9) 29.8 (0.73) 27.0 (0.71) 30.3 (0.58) 29.5 (1.35) 32.8 (0.84) 35.8 (1.16) --- (†) 40.0 (0.80)
Education
     specialist3
9   (0.9) 11   (0.9) 14   (1.0) 17 (2.4) 14 (1.3) 23 (2.3) --- (†) 25 (1.8) 3.0 (0.30) 2.9 (0.24) 3.1 (0.19) 3.6 (0.54) 2.8 (0.25) 5.0 (0.48) --- (†) 4.8 (0.33)
Doctor's 4   (0.7) 6   (0.8) 8   (0.8) 10 (1.2) 12 (1.9) 11 (2.0) --- (†) 14 (1.2) 1.5 (0.23) 1.8 (0.22) 1.8 (0.16) 2.2 (0.26) 2.4 (0.38) 2.3 (0.41) --- (†) 2.8 (0.23)

Years of teaching
    experience
                                                                     
Less than 3 38   (1.4) 47   (1.8) 73   (3.0) 71 (17.5) 72 (4.8) 52 (7.1) --- (†) 62 (2.4) 12.4 (0.44) 13.2 (0.47) 16.3 (0.44) 15.2 (3.50) 14.7 (0.92) 11.2 (1.54) --- (†) 12.1 (0.45)
3 to 9 111   (3.4) 123   (3.6) 144   (4.1) 162 (7.1) 163 (5.9) 150 (6.3) --- (†) 152 (4.8) 36.1 (0.85) 34.6 (0.67) 32.0 (0.56) 34.6 (1.65) 33.2 (1.05) 32.3 (1.07) --- (†) 29.8 (0.74)
10 to 20 109   (4.3) 122   (3.9) 137   (4.1) 130 (7.3) 133 (4.8) 147 (7.6) --- (†) 167 (4.7) 35.6 (0.78) 34.4 (0.77) 30.6 (0.54) 27.9 (1.63) 27.1 (0.83) 31.6 (1.38) --- (†) 32.9 (0.71)
Over 20 49   (2.8) 63   (2.8) 95   (2.8) 105 (7.0) 122 (4.7) 116 (7.2) --- (†) 128 (4.2) 15.8 (0.65) 17.8 (0.73) 21.2 (0.47) 22.4 (1.62) 24.9 (0.88) 24.9 (1.44) --- (†) 25.2 (0.67)

Level of instruction4
                                                                     
Elementary 179   (5.6) 225   (4.7) 261   (5.8) 263 (17.5) 258 (6.5) 245 (9.3) --- (†) 262 (6.1) 58.3 (0.92) 63.2 (0.72) 58.1 (0.66) 56.4 (3.06) 52.8 (1.03) 52.8 (1.67) --- (†) 51.4 (0.85)
Secondary 128   (4.7) 131   (4.0) 188   (6.2) 204 (13.4) 231 (7.1) 219 (9.9) --- (†) 247 (6.5) 41.7 (0.92) 36.8 (0.72) 41.9 (0.66) 43.6 (3.06) 47.2 (1.03) 47.2 (1.67) --- (†) 48.6 (0.85)
---Not available.
†Not applicable.
!Interpret data with caution. The coefficient of variation (CV) for this estimate is between 30 and 50 percent.
‡Reporting standards not met. Either there are too few cases for a reliable estimate or the coefficient of variation (CV) is 50 percent or greater.
1 Data for 1987-88 through 1999-2000 are only roughly comparable to data for later years, because the new category of Two or more races was introduced in 2003-04. Prior to 2003-04, respondents were asked to select only one race category from the options of White, Black, Asian or Pacific Islander, and American Indian or Alaska Native.
2 Includes Pacific Islander for 1987-88 through 1999-2000.
3 Education specialist degrees or certificates are generally awarded for 1 year's work beyond the master's level. Includes certificate of advanced graduate studies.
4 Teachers were classified as elementary or secondary on the basis of the grades they taught, rather than on the level of the school in which they taught. In general, elementary teachers include those teaching prekindergarten through grade 6 and those teaching multiple grades, with a preponderance of grades taught being kindergarten through grade 6. In general, secondary teachers include those teaching any of grades 7 through 12 and those teaching multiple grades, with a preponderance of grades taught being grades 7 through 12 and usually with no grade taught being lower than grade 5.
NOTE: Excludes teachers who teach only prekindergarten. Data are based on a head count of full-time and part-time teachers rather than on the number of full-time-equivalent teachers reported in other tables. Detail may not sum to totals because of rounding and cell suppression. Race categories exclude persons of Hispanic ethnicity. Some data have been revised from previously published figures.
SOURCE: U.S. Department of Education, National Center for Education Statistics, Schools and Staffing Survey (SASS), "Public School Teacher Data File" and "Private School Teacher Data File," 1987-88 through 2011-12; SASS, "Charter School Teacher Data File," 1999-2000; and National Teacher and Principal Survey (NTPS), "Public School Teacher Data File" 2015-16 and 2017-18 and "Private School Teacher Data File," 2017-18. (This table was prepared January 2021.)

2020 Tables and Figures All Years of Tables and Figures Most Recent Full Issue of the Digest