Second-grade hand-washing experiment leads to big decrease in bacteria, illness. Presented at: IDWeek; Oct. 4-8, 2017; San Diego. Disclosure: The researchers report no relevant financial disclosures.

An experiment with Petri dishes and black lights helped second graders observe the value of hand hygiene, according to an IDWeek 2017 study.

Second-grade teachers at Taylor Elementary School in Arlington, Va., had an idea: Look at the research on how homework affects young students and do what it says. They read studies done by Harris ...