From: Teaching evolution in U.S. public middle schools: results of the first national survey
 | Not covered | 1–2 | 3–5 | 6–10 | 11–15 | 15–20 | 20 or more hours | Total | N |
---|---|---|---|---|---|---|---|---|---|
 | % | % | % | % | % | % | % | % |  |
Hours devoted to creationism or intelligent design | |||||||||
 Middle school | 84.8 | 6.8 | 3.3 | 1.7 | 1.5 | 1.0 | 0.9 | 100.0 | 646 |
 High school | 86.6 | 9.0 | 2.1 | 1.1 | 1.0 | 0.1 | 0.2 | 100.0 | 783 |
 |  |  |  |  |  |  |  |  | N(*) |
 Middle school | 81.2 | 9.0 | 3.8 | 1.4 | 2.1 | 1.2 | 1.2 | 100.0 | 410 |
 High school | 85.9 | 9.5 | 2.3 | 1.1 | 1.0 | 0.1 | 0.2 | 100.0 | 725 |