The package includes:
(1) a technical report (in English and German) describing the study design, sample, instruments, and data collection procedures;
(2) codebooks for the student and teacher questionnaires, also available in English and German, documenting all survey items, scales, and coding schemes; and
(3) longitudinal datasets containing student-level and teacher-level survey data collected across two measurement waves (T1/T2).
The data support analyses of change in student-perceived instructional quality and teacher team processes over the course of the intervention.