Table 5 Pre/post gains in proportional reasoning and interests (statistically significant gains in italic)

Sum score

6.74

3.50

7.97

3.64

t(104) = 4.20, p < .00

School A

6.14

3.00

9.71

2.09

t(27) = 6.80, p < .00

School B

8.89

3.62

9.50

3.73

t(37) = 1.31, p = .20

School C

5.08

2.59

5.23

2.70

t(38) = 0.41, p = .69

Proportion correct

.56

.22

.62

.21

t(104) = 2.85, p < .01

School A

.52

.19

.66

.15

t(27) = 3.83, p < .01

School B

.68

.20

.68

.18

t(37) = 0.00, p = 1.0

School C

.46

.20

.53

.25

t(38) = 1.44, p = .16

Prompts attempted

12.27

4.08

13.08

4.38

t(104) = 1.90, p = .06

School A

11.93

3.62

15.00

2.98

t(27) = 4.57, p < .00

School B

13.37

4.09

14.11

3.93

t(37) = 1.37, p = .18

School C

11.44

4.24

10.69

4.65

t(38) = −0.91, p = .37

Student interest in mathematics

2.20

0.96

2.21

1.09

t(104) = 0.16, p = .87

School A

1.97

1.05

2.06

1.20

t(27) = 0.86, p = .41

School B

2.17

0.77

2.29

0.94

t(37) = 0.96, p = .35

School C

2.36

1.03

2.24

1.14

t(38) = −0.93, p = .36

Student interest in robotics

2.48

0.74

2.84

0.82

t(104) = 4.84, p < .00

School A

2.29

0.58

2.57

0.78

t(27) = 2.40, p = .02

School B

2.63

0.80

2.96

0.72

t(37) = 2.96, p = .01

School C

2.48

0.75

2.90

0.91

t(38) = 3.00, p < .01

Student values math in robotics

2.46

0.64

2.81

0.83

t(104) = 4.29, p < .00

School A

2.28

0.68

2.52

0.81

t(27) = 1.50, p = .15

School B

2.49

0.65

2.95

0.72

t(37) = 3.55, p < .01

School C

2.53

0.61

2.83

0.91

t(38) = 2.24, p = .03