Wood in schools reduce stress: "In an Austrian school classrooms equipped mainly with solid wood materials pupils exhibited a decreasing of heartbeats by an average of 8600 beats during the day and showed significantly higher vagal activity during wakefulness." 
"In medicine the vagal tone plays an important cardioprotective role, which means it protects the heart from infarction and injury." ...wooden classrooms means less stress, healthier and longer lived children. Who would not want this for their school?
Another Austrian study shows that sleeping in wooden beds also had big effects: "subjects had 3,500 fewer heartbeats per day and reported feeling more relaxed, feeling generally fitter & were socially more extraverted than beforehand, compared to subjects in imitation wood beds."
Sources for these studies: humanresearch.at/newwebcontent/
