Improving School Climate and Children's Well-being Through the Life Skills "Feel Good" Intervention in French Schools: A Controlled Before-and-After Study

Main Research Hypothesis: A playful, interactive, and repeated life skills development program in schools, co-designed with socio-educational stakeholders, will be effective in promoting positive school climate and children's well-being at school.

Specific Research Hypotheses:

• A playful, interactive, and repeated life skills development program in schools will have specific implementation conditions related to the children's contexts and the National Education, involving specific actors and program components;
• This life skills development intervention will reach a large number of students, ensuring satisfaction among children and stakeholders, while also identifying recommendations for content and implementation improvements;
• Pragmatic consensus-based recommendations will support child health stakeholders in designing, implementing, and evaluating life skills development programs in schools.

Primary Objective: Evaluate the effectiveness of a school-based life skills development intervention (4th and 5th grade) for improving school climate and children's well-being (STEP 2).

Specific Objectives:

• Evaluate the processes and feasibility elements of a school-based life skills development intervention to improve school climate and well-being (STEP 1);
• Assess the reach, the satisfaction, and adaptation proposals from stakeholders (children, teachers, parents) regarding the implemented intervention, based on existing data or interviews with participants (STEP 1);
• Develop recommendations/guidelines for designing, implementing, and evaluating interventions of this type (STEP 3).

Step 1: Process study (objectives 1 and 2) Type of study: Mixed-method study including: a quantitative step analyzing process indicators (fidelity, dose, adaptation, reach) and economic consideration of costs inherent to implementation. A qualitative step studying implementation contexts, reception (including understanding), acceptability, feasibility, and satisfaction among stakeholders. This qualitative step has already been carried out and a scientific article is in the process of submission.

Methodological framework: Medical Research Council (MRC) on Process Evaluation of Complex Interventions, Consolidated Criteria for Reporting Qualitative Research (COREQ) guidelines in the context of qualitative studies, and Consolidated Framework for Implementation Research (CFIR).

Step 2: Effectiveness study of the action (main objective) Type of study: Pre-post, here-elsewhere study to evaluate the effectiveness of the intervention, by measuring and monitoring the health determinants of the theoretical change model associated with the Feel Good intervention. Intervention group: children receiving the 10 sessions of the Feel Good intervention in Ile-de-France (n=1500) / Control group: children not receiving the intervention (n=1500), in Ile-de-France with similar characteristics for comparability (schools, classes, geographical areas).

Methodological framework: MRC recommendations regarding complex public health interventions.

Step 3: Implementation and evaluation recommendations for such actions (objective 3) Type of study: Consensus study for developing recommendations for implementation and evaluation practices of life skills development actions in schools, following the Delphi method.

Measures and data collection: Development of guidelines in two rounds:

• Questionnaire development based on evaluation data (Steps 1-2) and a literature review.

The questionnaire will be structured around: i) life skills intervention development and implementation modalities in schools (including recommendations for using the Feel Good intervention), ii) modalities/recommendations for full evaluation (process, effectiveness) of PPS interventions in schools.

• Delphi survey among stakeholders (field actors, researchers, decision-makers, others).

Inclusion criteria

• Children enrolled in grades 4 or 5 during the 2025-2026 school year who will participate in the Feel Good intervention (for pre- and post-program implementation)
• Children who are able to read and answer the questions on the questionnaire
• French-speaking children.

Exclusion criteria

• Children not enrolled in grades 4 or 5 during the 2025-2026 school year who will participate in the Feel Good intervention (for pre- and post-program assessments)
• Children who are not able to read and answer the questions on the questionnaire
• Non French-speaking children.