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 51 of 86
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A laser printer makes pages. It uses a beam of light. The light draws a picture. Then, special ink sticks to the page. Heat makes the ink stay. It makes words look very neat. Do you like to print?
Early Reader · Change the reading level on the articleA tool uses light to find distance. It sends out a beam. The beam hits something and comes back. It tells us how far away things are. This helps us measure rooms. Do you want to see how it works?
Early Reader · Change the reading level on the articleA big company builds hotels. They have hotels in many places. Some are in Asia. These hotels are very large. They help people go on trips. Do you like to travel?
Early Reader · Change the reading level on the articleA man made a new pen. It uses a tiny ball. The ball rolls to leave ink. This helps you write fast. It does not smudge. Do you use a pen to write?
Early Reader · Change the reading level on the articleLATAM is a big airline. It flies planes in many lands. It flies to many places far away. This helps people travel. It is very big! Do you like planes?
Early Reader · Change the reading level on the articleLath is a thin strip of wood. It helps hold walls together. It can also hold roof tiles. This helps keep your home strong. It is very useful! Do you see lath in a house?
Early Reader · Change the reading level on the articlePeople use wood strips to make walls. These strips are called laths. We nail them to the wall. Then we put wet plaster on them. This makes a smooth wall. It helps keep the room quiet. Do you like smooth walls?
Early Reader · Change the reading level on the articleLa Tur was a way to fly. It was an airline in Mexico. It flew big planes to far places. It helped people go on trips. It stopped flying long ago. Do you like to fly in planes?
Early Reader · Change the reading level on the articleA launch pad helps rockets fly. It is a big place on the ground. It holds the rocket up high. It can spray water to keep things safe. This helps the rocket go to space. Do you want to fly to the stars?
Early Reader · Change the reading level on the articleLawrence made new kinds of kites. His kites could lift a man. He went high up in the wind. This helped people learn how to fly. He was a great inventor. Do you like to fly kites?
Early Reader · Change the reading level on the articleLawrence Spivak worked with news. He helped make a show on TV. He asked people many hard questions. This helped us learn the truth. He was a very good news man. Do you like to watch the news?
Early Reader · Change the reading level on the articleA layover is a short break. You wait for a new ride. It can be a bus or a plane. This time helps the driver rest. It also helps you change rides. Do you like to travel?
Early Reader · Change the reading level on the articleSome batteries can be used again. This is a special kind of battery. It helps start cars. It can also power lights. It can take a long time to fill up. Do you have a battery in your toys?
Early Reader · Change the reading level on the articlePlanes have special parts on their wings. These parts slide out to help. They let a plane fly slow. This helps the plane land safely. It also helps the plane take off. It is very cool! Do you like planes?
Early Reader · Change the reading level on the articleFactories can work in a smart way. They make only what people need. This stops them from wasting things. It helps them work fast. This keeps costs low. Do you like to save things?
Early Reader · Change the reading level on the articleLee Byung-chul was a man in Korea. He started a big company. It was called Samsung. This company helps many people. He also loved art. Do you like art too?
Early Reader · Change the reading level on the articleLee Iacocca made many cars. He worked at big car companies. He helped make the Ford Mustang. He also helped Chrysler. He made many cars for us to drive. Do you like cars?
Early Reader · Change the reading level on the articleLee Kun-hee was a big leader. He ran a company called Samsung. He helped make many phones. He helped make many TVs. He was very good at his job. Do you use a phone?
Early Reader · Change the reading level on the articleLee Soo-man makes music. He started a big music company. He helped many singers become stars. This helps people enjoy songs. Do you like to sing?
Early Reader · Change the reading level on the articleLe Figaro is a news paper. It is from France. It is very old. People read it to learn things. It helps us know what is happening. Do you like to read news?
Early Reader · Change the reading level on the articleMachines can walk like animals. They use legs to move. Legs help them step over things. Wheels cannot do this as well. This makes them very good for bumpy ground. Do you like robots that walk?
Early Reader · Change the reading level on the articleLehman Brothers was a big business. It helped people with money. It worked for a long time. It was in a big city. Then the business closed. It was a very big change. Do you know about big businesses?
Early Reader · Change the reading level on the articleThis is a long water path. It goes between two towns. Animals pulled boats on it. It helped people move things. It was a very old way to travel. Can you see the water?
Early Reader · Change the reading level on the articleLenovo makes many tools for us. They make computers and phones. Some are for work. Some are for play. We use these to learn and talk. Do you use a computer?
Early Reader · Change the reading level on the articleLeo Burnett made famous ads. He made many fun characters. He made the Jolly Green Giant. He made Tony the Tiger too. These ads help us know things. Do you like these characters?
Early Reader · Change the reading level on the articleLeo Fender made music tools. He built guitars that use power. These guitars help bands play loud. Many people love his work. Do you like music?
Early Reader · Change the reading level on the articleLeonard helped computers talk. He made tools to link them. This helps us use the web. It makes our world work well. He is a smart helper. Do you like using computers?
Early Reader · Change the reading level on the articleLeslie Lamport helps computers work. He makes many computers talk to each other. This helps them work well together. His work is very helpful to us. He is a smart man. Do you like computers?
Early Reader · Change the reading level on the articleA level is a tool. It helps us see flat ground. It uses a tube to look far away. People use it to build big things. It helps keep things straight. Do you like to build things too?
Early Reader · Change the reading level on the articleThis is a long tool. It has many marks on it. People use it to see how high things are. It helps us know if the ground is flat. It is very useful. Do you want to see the marks?
Early Reader · Change the reading level on the articleA lock keeps things safe. It uses small metal parts. These parts move when you use a key. The key lifts the parts up. Then the door can open. Do you have a lock on your door?
Early Reader · Change the reading level on the articleLevi Strauss made blue jeans. He lived in a big city. He sold many things. His pants helped people work. We wear jeans today. Do you like to wear jeans?
Early Reader · Change the reading level on the articleLew Wasserman worked with movies. He helped many stars. He even helped run a big movie place. He was very good at his job. He won a special prize from the President. Do you like movies?
Early Reader · Change the reading level on the articleLG is a big company. It is from South Korea. They make many things. They make TVs and phones. They also make soaps. LG helps us in our homes. Do you use things from LG?
Early Reader · Change the reading level on the articleThis is a news paper. It comes from a place called France. It tells people what is happening. It helps us learn new things. It is very old. Do you like to read the news?
Early Reader · Change the reading level on the articleLibreOffice is a set of tools. It helps you do work on a computer. You can write stories. You can make charts. It is free for everyone to use. It helps us all work together. Do you like to write stories?
Early Reader · Change the reading level on the articleA special light helps us see. It shoots a tiny beam. The light hits something and comes back. This tells us how far away it is. It makes maps of the land. Can you imagine seeing with light?
Early Reader · Change the reading level on the articleA lifeboat is a special boat. It helps people in the water. It can use an engine to go fast. Some boats use sails or oars. These boats save lives at sea. They are very helpful. Do you like boats?
Early Reader · Change the reading level on the articleA lifebuoy helps people stay safe. It is a ring that floats. You can throw it to someone in the water. It helps them stay up. It can even have a light. It helps keep people safe. Can you see it float?
Early Reader · Change the reading level on the articleLife was a famous book. It had many big pictures. These pictures showed the whole world. People loved to see them. It helped us see far away places. Do you like looking at photos?
Early Reader · Change the reading level on the articleSome things are too heavy to lift. We use tools to move them. Machines can lift big loads up. They help us build tall things. These tools help us stay safe. Do you see big machines at work?
Early Reader · Change the reading level on the articleLights help us see in the dark. Some lights sit on a table. Others hang from the ceiling. Some lights use a plug. Some use a battery. Lights make our homes bright. Do you have a lamp in your room?
Early Reader · Change the reading level on the articleSome trains are small. They carry more people than a bus. They use short trains. They use small stations too. These trains help us move around. They are very fast. Do you like riding trains?
Early Reader · Change the reading level on the articleA lightning rod is a metal pole. It sits on top of a building. It catches lightning from the sky. Then a wire carries the spark to the ground. This helps keep the building safe from fire. It is a smart tool. Do you…
Early Reader · Change the reading level on the articleTrains run on tracks in cities. They move many people. These trains use electricity. They can go on streets. They can also go in tunnels. They help us get around. Do you like trains?
Early Reader · Change the reading level on the articleA light tube brings sun inside. It uses a tube to move light. The tube can be very shiny. This helps the light travel far. It can light up a dark room. It helps us see better. Can you see the light move?
Early Reader · Change the reading level on the articleLila Wallace helped many people. She made a famous magazine. It was called Reader's Digest. She gave much money to help others. She liked to help music too. Do you like to read books?
Early Reader · Change the reading level on the articleLiliane was a very rich woman. She helped run a big beauty company. She lived in a place called France. She also gave money to help people. Her money helped doctors and art. Do you like art?
Early Reader · Change the reading level on the article