Explore inventions, engineering, computing and the tools people build to solve problems. Choose an article below; its reading controls let you move between the available levels.
4,107 public articles · Page 45 of 86
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A big bridge connects three cities. It goes over the sea. It even has a tunnel under the water. This helps people travel fast. It is a very long way. Can you imagine driving on it?
Early Reader · Change the reading level on the articleA hook is a tool. It has a curved part. This part grabs things. It can hold a heavy load. It helps us move stuff. It is very useful. Do you see hooks at home?
Early Reader · Change the reading level on the articleA hook is a tool. It has a wood handle. It also has metal. It helps move heavy things. It keeps your hands safe. It can move hay or wood. Do you want to try one?
Early Reader · Change the reading level on the articleHorace Smith was a man who made tools. He worked with metal to make guns. He made a tool for big ships. He also helped start a big company. His work helps people today. Do you like to build things?
Early Reader · Change the reading level on the articleA horse pulls a big car. The car runs on metal tracks. It helps people move around. The tracks make the ride smooth. It is better than a bumpy road. Do you like rides?
Early Reader · Change the reading level on the articleA horseshoe is a hard shell. It goes on a horse's foot. It keeps the foot safe from wear. It helps horses walk on wet ground. It does not hurt the horse. Do you like horses?
Early Reader · Change the reading level on the articleA hospital ship is a floating hospital. It stays on the water. It helps people who are sick. It helps people who are hurt. These ships help many people. Do you want to see a ship?
Early Reader · Change the reading level on the articleAn hourglass tells time. It has two glass bulbs. Small bits fall through a thin neck. This helps us see time go by. It was used on big ships. It is fun to watch! Can you see the bits fall?
Early Reader · Change the reading level on the articleBig ships move in a deep path. This path is in Texas. It carries food and oil. It helps many people. It is a busy place. Do you like big ships?
Early Reader · Change the reading level on the articleHoward Aiken was a smart man. He helped build a big machine. This machine could do math. It helped people do hard work. He was a pioneer. Do you like math too?
Early Reader · Change the reading level on the articleHoward Smith told the news. He spoke on the radio. He also spoke on TV. He traveled to many places. He told people what was happening. He was a very good reporter. Do you like to watch the news?
Early Reader · Change the reading level on the articleHoward Schultz is a man who loves coffee. He helped make Starbucks very big. He grew many coffee shops around the world. This helps people enjoy a drink together. He also helps people find jobs. Do you like to go to…
Early Reader · Change the reading level on the articleA howitzer is a big gun. It can shoot high or low. It can shoot over walls. It helps people in wars. It is a very strong tool. Do you want to see more?
Early Reader · Change the reading level on the articleHSBC is a very big bank. It helps many people with money. It has offices in many lands. It started a long time ago. It helps people all over. Do you have a bank?
Early Reader · Change the reading level on the articleComputers use colors to make pictures. They use special ways to pick colors. These ways help us find the right shade. One way is to pick a color like red. Then we pick how bright it is. It helps us make art. Do you…
Early Reader · Change the reading level on the articleComputers use special rules for the web. These rules help show pictures and videos. They help make the web work well. This helps us see things on screens. Do you like watching videos online?
Early Reader · Change the reading level on the articleThe web has a secret way to talk. It keeps your things safe. It hides your words from others. This helps you stay private. It is good to use. Do you like to stay safe?
Early Reader · Change the reading level on the articleHuawei is a big company. They make many things. They make phones and tools for computers. They help people talk to each other. This helps us stay close. Do you use a phone?
Early Reader · Change the reading level on the articleHubert was a man who wrote news. He lived in a place called France. He helped start a big paper. It was called Le Monde. This paper helped tell the truth. Do you like to read news?
Early Reader · Change the reading level on the articleHubert Booth made a new tool. It sucked up dirt. Old tools just blew dust away. His tool pulled dust inside. This helped keep rooms clean. It was a big machine. Do you have a vacuum at home?
Early Reader · Change the reading level on the articleA big company was born long ago. It traded soft furs for goods. They used warm blankets for trade. This helped people get what they needed. It was a very old company. Can you imagine trading furs?
Early Reader · Change the reading level on the articleHugh Hefner made a magazine. He lived in a big house. He liked to have parties. He was very famous. Many people knew his name. Do you know any famous people?
Early Reader · Change the reading level on the articleHugo Schmeisser was a maker of tools. He made tools for soldiers. He worked in a city in Germany. His tools were used in big wars. He was very good at his work. Do you like to make things?
Early Reader · Change the reading level on the articleWe use many ways to talk. We use our voices to speak. We can also use our hands. We use our eyes to see signs. This helps us share ideas. It helps us make friends. How do you talk to your friends?
Early Reader · Change the reading level on the articleYou talk to computers. You can use your voice. You can use your hands. You can even use your eyes. This helps us use machines well. It makes things easy for us. How do you use a computer?
Early Reader · Change the reading level on the articleThe Humber Bridge is very big. It goes over the water. Many cars drive on it. It helps people get to new places. It is a great sight to see. Do you like big bridges?
Early Reader · Change the reading level on the articleA humidifier helps your room. It adds water to the air. It can make a fine mist. This helps your skin feel good. It can help protect old books too. Do you like moist air?
Early Reader · Change the reading level on the articleA hunting knife helps people eat. It cuts meat and skin. It is not for stabbing. Some knives fold to fit in a pocket. This tool is very useful in the wild. Do you see how it works?
Early Reader · Change the reading level on the articleThis is a very old book. It tells how to make fire tools. These tools used a special powder. They could shoot big rockets. They could even make loud booms. It is a very cool book! Do you like old things?
Early Reader · Change the reading level on the articleHu Shuli tells big stories. She writes for news books. She helps people learn the truth. She started a news group. She is a great leader. Do you like to read news?
Early Reader · Change the reading level on the articleWe use colors to make things look good. You can pick a main color first. Then you add white to it. You can also add black. This helps you make the right shade. It is easy to do. Do you have a favorite color?
Early Reader · Change the reading level on the articleA hybrid uses two ways to move. It can use fuel. It can use a battery. This helps it save fuel. It also helps the air stay clean. Do you like cars?
Early Reader · Change the reading level on the articleThe Hyderabad Metro is a fast train. It travels through a big city. Many people ride it every day. It helps people get to work. It is a fun way to travel. Do you like trains?
Early Reader · Change the reading level on the articleA machine part uses oil to move. It works like a muscle. It pushes and pulls hard. It helps big trucks lift heavy dirt. It helps machines build things. Do you see these on a big truck?
Early Reader · Change the reading level on the articlePeople work with water. They move it to new spots. They use hills to help it flow. This helps crops grow. It helps us too. Do you like to play in water?
Early Reader · Change the reading level on the articleMachines use liquid to do work. This liquid moves through tubes. It pushes hard to lift heavy things. It helps big trucks move. This makes big jobs easy. Can you see a big machine?
Early Reader · Change the reading level on the articleA metal block moves oil in a machine. It acts like a switch. It sends oil to parts that move. This helps a big machine work. It makes the machine easy to use. Can you see how it works?
Early Reader · Change the reading level on the articleThis tool uses liquid to spin. It pushes oil to make things move. It can turn big wheels. This helps move heavy things. It is very strong. Do you want to see it work?
Early Reader · Change the reading level on the articleThis tool moves water. It uses moving water to work. It can push water up a hill. This helps people get water. It does not need power from a plug. Do you like to play in water?
Early Reader · Change the reading level on the articleSome boats can fly on water. They have wings under the boat. As the boat goes fast, the wings lift it up. This helps the boat go very fast. It is like a plane on the sea. Do you want to ride one?
Early Reader · Change the reading level on the articleWe can use a gas called hydrogen for power. It helps big ships and factories move. It can help keep our air clean. This is good for the Earth. Can you imagine a world run by this gas?
Early Reader · Change the reading level on the articleA link is a tiny door. You tap it on a screen. It takes you to a new page. It can even show a new picture. It helps us find things fast. Do you like to click links?
Early Reader · Change the reading level on the articleThis was a very fast computer. It helped people do big math. It was the best in the world for a while. It helped make new tools for us. It was a big step for science. Do you like computers?
Early Reader · Change the reading level on the articleSome computers work the same way. They use the same parts. They can run the same programs. This helps people use them. Many computers we use today are like this. Do you use a computer?
Early Reader · Change the reading level on the articleThis is a famous computer. It helped many people work. It was made a long time ago. Now, many computers look like it. It was a very big deal. Do you like computers?
Early Reader · Change the reading level on the articleIBM made a smart brain for computers. It helps big machines work fast. This brain was used in very large computers. It helps computers do many jobs. It is a very cool tool. Do you like fast computers?
Early Reader · Change the reading level on the articleAn icebreaker is a strong boat. It helps other ships move. The boat pushes through thick ice. It makes a safe path in the water. This helps ships travel to new places. Do you like big boats?
Early Reader · Change the reading level on the articleAn ice cream van is a big car. It sells cold treats. The van plays music to find you. It might go to a park or a beach. We love to eat ice cream on a hot day. Do you hear the music?
Early Reader · Change the reading level on the article