Fragile Earth

Gr 6 Up—Fascinating before-and-after images of a range of environmental phenomena are presented in this photo gallery detailing "Man's Impact" on the environment, "Deserts and Droughts," "Warming World," "Water Power," "Wild Weather," and "Natural Phenomena." Users can filter results by date, region of the world, or theme. The paired images are superimposed so that it appears viewers are looking at time-lapse photography; by sliding the photos right or left, they can choose to view them side-by-side, or one at a time, full screen. Pinching and stretching provides detailed close-up views.Some of the before-and-after photos are separated by 15 minutes, while others allow viewers to see changes such as those visible in the satellite photos of Amazon deforestation over a nine-year period. The aftereffects of tsunamis and earthquakes and other natural events make clear how powerful—and devastating—those forces can be.The layout is both clean and intuitive. Navigation between images is easy and a tap to the "back" button will return users to illustrated index or table of contents. Menus disappear with a single tap for full-screen viewing.A great visual resource for students or teachers working on environmental projects or lessons, and one that will work well for the flipped classroom.—Sydnye Cohen, Library Media Specialist Brookfield High School, Brookfield, CT