Crystal Lake Community Consolidated School District 47 is a district containing elementary and middle schools and serving Crystal Lake, Illinois and some of Lake in the Hills. The current Superintendent is Ronald R. Miller. Webmaster is Scott Harnish Image File history File linksMetadata D47Apple. ... Primary or elementary education consists of the first years of formal, structured education that occurs during childhood. ... Middle school, (Intermediate/Junior high school) covers a period of education that straddles primary education and secondary education, serving as a bridge between the two. ... Crystal Lake is a city located in southeastern McHenry County in northeastern Illinois. ... Lake in the Hills or L.I.T.H is a village in McHenry County, Illinois, United States. ...