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Table 1 Hours reported as devoted to human evolution and general evolution in high school biology classes (column percentages)

From: Teaching evolution in U.S. public schools: a continuing challenge

 

2007 (N = 926)

2019 (N = 752)

Human evolution

General evolutionary processes

Human evolution

General evolutionary processes

Not covered

17%

1%

17%

5%

1–2 h

35%

9%

28%

8%

3–5 h

25%

23%

20%

13%

6–10 h

12%

27%

14%

25%

11–15 h

4%

17%

7%

18%

16-20 h

2%

11%

5%

14%

20 h or more

2%

10%

5%

13%

No answer provided

2%

2%

4%

4%

Total

100%

100%

100%

100%

Mean hours

4.1

9.8

7.7

12.4

Standard Deviation

4.8

6.3

6.3

6.8