From classrooms to change: The SampAssador School Challenge

When you step into a schoolyard in Jakarta or Surabaya these days, you don’t just hear the chatter of students swapping homework tips. You hear debates about plastic bottles, sachets and different sorting bins. For Indonesia’s youth, the waste crisis is no longer a distant environmental issue. It’s the trash pile right next to the school yard, shaping their daily lives and conversations.

To turn awareness into action, the Indonesian NGO Veritas Edukasi Lingkungan (VEL), supported by Greiner Packaging, launched the SampAssador School Challenge, a nationwide online competition that transforms junior and senior high schools into living laboratories of sustainability.

At the heart of the challenge is SampApp, a gamified education app developed by VEL to make learning about waste management fun and accessible. Students become “SampAssadors,” waste ambassadors leading the charge toward cleaner classrooms and healthier ecosystems.

Through the challenge, schools compete not just for prizes but for pride, recognition, and the opportunity to lead by example in their communities. Every student who downloads and plays through SampApp contributes to their school’s score. Creativity and commitment count. Schools are encouraged to complete learning modules on plastic waste prevention and management while demonstrating how they apply what they learn in real life. 

The SampAssador School Challenge was a huge success: More than 20 schools participated with more than 5.000 Indonesian school kids receiving training on how to prevent and manage plastic waste.

The rewards are designed to motivate teachers and students alike: the top ten schools receive exclusive sustainability curricula and surprise boxes of eco-tools to create a momentum. For the top three schools, the prize goes beyond material rewards: a one-day visit from the content creator @bulesampah, with on-site workshops and video production to amplify their story across social media - as @bulesampah reaches millions of Indonesians with waste education content. 

Schools have embraced the challenge with creativity and pride. Many produced motivational videos showing how they bring environmental change to their schoolyards and shared them on social media. Some schools installed signage reminding students to reduce waste, others have set up bins for collection. And some kids just took action themselves by posting their own pictures of everyday responsibility, like carrying refillable water bottles and lunchboxes.

The magic lies in how playful competition drives real change. Leaderboards track the fastest completions and highest points inside SampApp, creating an atmosphere of teamwork, fair rivalry, and purpose. In classrooms students race to finish SampApp modules, turning learning into a game: they watch videos about plastic production, consumption and waste management and answer questions competing on a leaderboard while collecting points and coins, which can be exchanged for rewards. SampApp also contains waste sorting games and a plastic footprint calculator as side-missions.

This approach is more than just hype. Every participating school becomes part of a larger impact evaluation. Pre-tests, in-app tracking, and post-program interviews allow VEL to measure changes in knowledge, behavior, and actual reduction in single-use plastics. The goal is not only to inspire students, but to prove that behavior change is real, and that schools can be engines of community transformation.

The challenge is supported by Greiner Packaging, whose sustainability strategy emphasizes consumer education as the missing link in fighting plastic pollution. By backing VEL’s school challenge, Greiner ensures that corporate responsibility translates into tangible action: empowered teachers, motivated students, and cleaner communities.

SampApp’s SampAssador School Challenge is more than a contest. It’s a blueprint for how schools, communities, and corporate partners can join forces to make waste prevention a lived reality - one classroom at a time.