An elementary school in Koriyama City, which is located in Fukushima Prefecture some 34 miles west of the Fukushima Daiichi nuclear power plant, is using water bottles to shield radiation coming from the courtyard and other areas around the school buildings. The bottles are filled with water and placed inside of square boxes which are stacked around the classrooms.
According to the school it seems to have reduced the radiation levels inside by one-third.
Residents of Koriyama City have been concerned about the high amounts of radioactive materials which have been found around their town. While school lunches are tested for radiation, parents are concerned because they are largely unable to find out where the items were originally produced. Because Koriyama City is outside of the evacuation zone, the government has barely conducted any decontamination activities.
H/T: Yuri Hiranuma
Source: Koriyama City Elementary School
Source: Human Rights Now