Spencer Loomis student council members Megan McGuckin (from left), Kaushik Jegath, Summer Sagisi, Alyson Kee and Daniela Morga wore jeans to school last week to raise money for rare disease research. | Joe Cyganowski~For Sun-Times Media

Spencer Loomis student council members Daniela Morga (from left), Sarah Tritsch and Alyson Kee explain the motivation behind its Dollar Denim Days fundraiser, which helped Two Hearts Rock fund rare disease research. | Joe Cyganowski~For Sun-Times Media

Spencer Loomis student council members Megan McGuckin (from left), Kaushik Jegath, Summer Sagisi, Alyson Kee and Daniela Morga wore jeans to school last week for its Dollar Denim Days fundraiser. | Joe Cyganowski~For Sun-Times Media

Spencer Loomis Elementary School students organized Dollar Denim Days last week to raise money for rare disease research. Students donated $1 each day they wore jeans to school. | Joe Cyganowski~For Sun-Times Media