III. TOOL ASSESSMENT
In this section we report on the experience using Evaluators in a Compiler Construction course at Complutense University. In this experiment, 19 students participated in the Evaluators usage experience, which was conducted as extra credit. We collected student experiences and favourable / unfavourable attitudes with a survey consisting of structured questions. Table 1 summarizes the results. This qualitative survey consisted of seventeen Likert-scale items, as listed in the left column of Table 1. In order to develop the survey items we were inspired by and adapted the TUP model for evaluating educational software [5]. Survey items were divided into pedagogical and usability aspects. Pedagogical utility and context adequacy, in the first case, and learnability, interaction facilities and overall usability judgment, in the second case, are assessed.