Assessment of the outcomes
A registration form has been developed to use during the assessment and data collection of outcomes. The form is designed so the teacher can click whether the student answers options 1, 2, 3, or 4. It is the student’s teacher who will carry out all the tests. The teacher must register correct or incorrect responses during the assessment. Only the teacher and the student will be present during the testing, and all test situations will be filmed. Each student will receive an individual follow-up plan that will describe in detail when tests will be carried out and when the intervention will start. Within each phase, 20% of the recorded films will be randomly selected and evaluated by two external raters at item-level across the five primary outcomes. Agreement between the two raters and the teachers will be checked, and in case of agreements below 80%, all the films will be checked.