Abstract Background It is essential to address food sustainability (FS) within the school community to enhance both public and environmental health. In Portugal, in the scope of AML Alimenta, teachers’ training on FS was identified as a priority. Therefore, local partners along with academia developed, implemented, monitored, and evaluated the SustentAÇÃO. Objectives SustentAÇÃO aimed to empower school teachers in the Lisbon Metropolitan Area to teach students between 6 and 14 years old on FS. The program consisted of 10 hours of asynchronous online learning (MoodleTM), structured in 4 modules, and 10 hours of autonomous learning (5 students’ educational sessions), offering autonomy and flexible time management. The contents were adapted for different age groups. The teacher’s performance was monitored and evaluated continuously. A process evaluation was conducted for both teachers and students. Results Of the 79 teachers enrolled, 47% completed the program. Teachers’ performance (0-20) on the 4 evaluation questionnaires was on average 17,9±3,13. Most teachers found the program benefited their work (94%) and considered it essential for enhancing student’s knowledge (98%). Considering overall satisfaction, 85% of teachers were satisfied or very satisfied with the training and 91% would recommend it to their colleagues. Additionally, 86% of students enjoyed the activities delivered, 76% considered that they were wasting less food, and 78% believed they had improved their ability to make healthier and more sustainable food choices. Conclusions Through a collaborative work between local partners and academia, an innovative e-learning training programme on FS was developed, implemented, monitored, and evaluated, responding to the local needs identified. SustentAÇÃO complies with national education guidelines and contributes to the sustainable development goals agenda. Key messages • SustentAÇÃO E-learning training highlights the importance of collaborative work, based on an initial assessment to target local needs. • SustentAÇÃO E-learning training improve teachers’ knowledge on FS and benefit their students.
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