Region
Aids and devices
1
Books and reading
1
Canada
1
China
3
EE.UU
1
Earth (Planet)
1
Education (Elementary)
1
Education (Secondary)
1
English-speaking countries
1
Gettysburg National Military Park (Pa.)
1
Iowa
1
Japan
1
Jimmy Carter National Historic Site (Plains, Ga.)
1
New York
1
New York (State)
1
Pennsylvania
1
Philadelphia
1
Psychology
1
Riceville
1
Study and teaching
1
Study and teaching (Elementary)
3
Tennessee
1
USA
1
United States
United states
1
Washington (State)
1
West (U.S.)
1
Wounded Knee (S.D.)
1
Wounded Knee Memorial and Historic Site (S.D.)
1
États-Unis
2