Textbooks Published in Different Time Periods

Comparison of Textbooks Published in Different Time Periods 

Comparison of textbooks published in different time periods shows that the mean score increases gradually from 1954 to about 1989 and then decreases once again (see Table 3). In other words, this study showed that the 14 textbooks published between 1980 and 1989 had more historical details than other time periods. Interestingly, the two textbooks (Russell and Larena 1988 Segal 1989) that had the highest score of five points were also published in this time period. Nevertheless, it is important to note that despite some differences over time periods, most textbooks had very low scores. Of the 128 textbooks analyzed, 74 (58%) had a score of 0 or 1, and only two textbooks had a score of 5 (scale of 0-12). The difference between the mean score of textbooks published in the period 1960-1969 is significant with respect to (a) Period 1970-1979 (df = 50, t = 2.45, p 0.05) (b) Period 1980-1989 (df=37, t = 2.83, p 0.01) (c) Period 1990-1999 (df = 50, t = 3.32, p 0.01) and (d) Period 2000-2011 (df =54, t = 2.61, p 0.05). This shows that the presentation of textbooks after the period (1960-1969) has improved significantly in subsequent periods. 

Textbooks Scores Time period (years) Change 

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