
Every year, something magical happens in Chicago. The river turns bright emerald green, thousands of people gather along its banks, and a secret recipe is poured into the water. But how did this tradition begin? Who is behind it? And is it safe for the environment?
This engaging 90-minute lesson for B1 intermediate learners takes students on a journey through one of America’s most unique cultural celebrations. Inspired by an authentic Scripps News video report, students will explore the fascinating story of how a group of plumbers accidentally started a tradition that now attracts visitors from around the world.
Students will develop:
- Reading skills through a carefully written text about the history and controversy surrounding the river dyeing
- Listening comprehension by watching authentic video footage of the event and hearing from real people involved
- Vocabulary acquisition with two matching exercises featuring words like emerald, spectacle, transparency, and shamrock
- Speaking and discussion skills through partner and group conversations about traditions, environmental responsibility, and cultural celebrations
- Critical thinking by examining both sides of the environmental debate and forming their own opinions
- Creative collaboration in extension activities where students plan their own environmentally-friendly events or research local traditions
Perfect for St. Patrick’s Day, units on traditions and celebrations, or lessons about environmental awareness. Your students will never forget the story of the plumbers who turned a river green.
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Celebrate St. Patrick’s Day in class with the story behind Chicago’s emerald river.

