The first teachers in the United States were students who did well in school and were hired to teach other students. Today, teachers must have college degrees to teach. Schools today are larger than those in the past and often have several separate classes at the same grade level.
Firefighters are community heroes and their job is to help wherever there is trouble. Firefighters must be well trained, wear protective uniforms, and ride on trucks that are equipped to fight fires. Firefighters and the equipment they use today have changed significantly over the years.
Journey through Earth's wet and wild rainforests with vivid photographs of the most unique plants and animals in the world's most untouched forests. Readers are introduced to the importance of protecting the rainforests and vocabulary related to the rainforest and its amazing inhabitants.
Take a trip through the different forests of the world to discover where forests are located and what types of animals are native to forests. This book features colorful pictures, a detailed map of forests on earth, and vocabulary related to forests.
Discover the heat of the desert, its plant and animal life, and principles of evaporation and erosion. A detailed map is included that shows the locations of the world's deserts as well as a graph that shows largest deserts in the world.
Doctors help people stay healthy. When people get sick, doctors help them get well again. Today, doctors use many complex instruments to treat people. Long ago, doctors had few instruments and did not know as many ways to help people get well.
