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By Alice E Beetz; Appropriate Technology Transfer for Rural Areas (Organization)

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1. 4. Levels of response for overall response to Profile Questions 1 and 2 (n = 42). Level Profile Question 1 Profile Question 2 0 10 15 1 2 3 2 12 8 3 18 6 4 NA 10 The teachers’ number of years of teaching experience were split into three groupings: less than 5 years (14 teachers), 5 to 14 years (13 teachers), and 15 or more years (13 teachers). Two teachers did not respond to this question. The teachers’ previous tertiary exposure to mathematics courses was recorded in four categories; none (9 teachers), one semester [Sem] (11 teachers), one year [Yr] (11 teachers), and more than one year [More] (10 teachers).

Cohen’s d effect size was calculated to identify the size and direction of any change in reported students’ beliefs from year to year. The classroom practice section of the student survey contained 9 statements in 2005, 8 in 2006 and 11 in 2007, with 5 statements common to all years. Rasch measurement was used to create a scale of classroom practice beliefs, and the 5 common items provided an anchor from the initial administration to the subsequent measures. Student ability measures obtained from this scale were used as a basis for identifying change across time.

For the analysis of teacher change over the project the original data set used to model teacher understanding was augmented by one teacher; the software Winsteps (Linacre, 2006) and the Rasch Partial Credit Model (Masters, 1982) were used for the analysis reported here. Of the 59 individual profile items, 49 were common to both initial and final profiles and were used to link the two profiles for analysis. The 49 link items provided an anchor set that established the difficulties of the items at each test administration relevant to each other and estimates of person ability were identified for each teacher in the original 32 METHODOLOGY and follow-up profile, anchored to the same set of link item difficulties so that genuine comparisons could be made.

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Agroforestry : overview by Alice E Beetz; Appropriate Technology Transfer for Rural Areas (Organization)


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