## 4 Results  
### Objective 1  
In order to respond to research objective 1, concerning the description of the degree of perception of student motivation and satisfaction, the indices of central tendency were calculated for each of the blocks. This was done before and after the intervention, which, as stated above, consisted of the implementation of an alternative intervention programme with the experimental group and a traditional teaching unit with the control group. Table 3 shows the descriptive results in terms of median, mean and standard deviation for each group, regarding their degree of perception of motivation before and after the thematic unit on WWII. As can be observed in Table 3, the median values with respect to the pretest range between 3 and 4 points, with the maximum score occurring in items 4 and 6 (Md = 4) for both groups. On the other hand, item 3 is the only item with a difference in value between the groups: in the experimental group, the median is 3 points, while in the control group it is slightly higher (Md = 4). The difference in median for this item also translates into an observable divergence in terms of the trend of the mean between the experimental group (M = 3.23; SD = 1.130) and the control group (M = 3.56; SD = 1.022), with a difference of 0.33 points. As for the posttest, a substantial improvement can be observed in the central tendency indices of the experimental group compared to the control group, where the most outstanding median is found in item 6, with a value of 5 points. This shows that more than 50% of the students in the experimental group clearly stated that they felt motivated thanks to the variety of resources used in class, while in the rest of the items of the construct the median is 4 points out of 5, placing more than half of the group between these two values. Furthermore, the mean of this block follows a trend that ranges between 3.70 (SD = 0.938) and 4.44 (SD = 0.660). In contrast, the scores of the control group are lower. These findings are confirmed when analysing the median, which is 4 for item 3 and item 4, but 3 for the rest of the items in the block. This indicates that more than half of the young people in the control group were between indecision and limited agreement, with their perception being widely distributed over the five response options. The mean trend follows a similar \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multicolumn{1}{c}{**Block I. Motivation with Teaching and Learning**} & & & & & \\ \hline \hline \multirow{4}{*}{1. Motivation to learn more about history} & Pretest & Exp. & 3 & 3.26 & 1.163 \\  & & Ctrl. & 3 & 3.15 & 1.157 \\  & & Exp. & 4 & 4.18 & 0.758 \\  & & Ctrl. & 3 & 3.19 & 1.224 \\ \cline{2-6}  & & Exp. & 3 & 2.97 & 1.141 \\  & & Ctrl. & 3 & 3.05 & 1.105 \\  & & Exp. & 4 & 4.18 & 0.758 \\  & & Ctrl. & 3 & 3.19 & 1.252 \\ \cline{2-6}  & & Exp. & 3 & 3.23 & 1.130 \\  & & Ctrl. & 4 & 3.56 & 1.022 \\  & & Exp. & 4 & 4.09 & 0.668 \\  & & Ctrl. & 4 & 3.46 & 1.164 \\ \cline{2-6}  & & Exp. & 4 & 3.50 & 1.261 \\  & & Ctrl. & 4 & 3.42 & 1.133 \\  & & Exp. & 4 & 4.06 & 0.788 \\  & & Ctrl. & 4 & 3.42 & 1.262 \\ \cline{2-6}  & & Exp. & 3 & 3.26 & 1.136 \\  & & Ctrl. & 3 & 3.07 & 1.127 \\  & & Exp. & 4 & 3.70 & 0.938 \\  & & Ctrl. & 3 & 3.08 & 1.193 \\ \cline{2-6}  & & Exp. & 4 & 3.50 & 1.161 \\  & & Ctrl. & 4 & 3.32 & 1.195 \\  & & Exp. & 5 & 4.44 & 0.660 \\  & & Ctrl. & 3 & 3.20 & 1.399 \\ \hline \hline \end{tabular} Note. Inst = instrument; Md = median; M = Mean; SD = standard deviation; Exp. = experimental; Ctrl. = control.  
\end{table} 
Table 3: Perception of motivation before and after the intervention. pattern, with values ranging from 3.08 (SD = 1.193) for item 5 to 3.46 (SD = 1.164) for item 3, with minimal differences between all the items. Table 4 shows the descriptive results for each group, analysing their perception of satisfaction before and after the WWII intervention.