Printing
Printing makes many copies. It makes books and pictures. Long ago, people used wood blocks. Now we use machines. It helps us all learn. Do you like books?
Early Reader · Change the reading level on the articleTechnology articles — Page 2
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 2 of 86
Publishing
People make things for us to read. They make books and news. They also make songs and games. This helps us learn new things. It can be on paper. It can be on a screen. Do you like to read books?
Early Reader · Change the reading level on the articleRadar
Radar helps us see far away. It sends out waves. These waves bounce off things. Then they come back to us. This shows where things are. It helps planes fly safely. Can you imagine seeing through fog?
Early Reader · Change the reading level on the articleRadio
Radio sends news through the air. It uses waves to travel. These waves carry sound to you. They help us talk far away. We use them for phones too. It is like magic! Can you hear the radio?
Early Reader · Change the reading level on the articleRefrigeration
Machines can make things cold. They take heat away. This helps keep our food fresh. It helps us eat good food. We use them every day. Do you have a cold fridge at home?
Early Reader · Change the reading level on the articleRenewable energy
We can get power from nature. The sun and wind help us. We use them to make light. This is good for our air. It helps keep the Earth clean. Do you like the sun?
Early Reader · Change the reading level on the articleRoad
A road helps us go places. It can be made of stone or dirt. Many roads are smooth and paved. They help cars and bikes move. Roads make travel easy for you. Do you see a road near your home?
Early Reader · Change the reading level on the articleRobotics
Robots are smart machines. They can do many jobs. Some robots help people work. They can even fly or climb. They use power from a battery. We use them to help us every day. Would you like to build one?
Early Reader · Change the reading level on the articleRocket
A rocket is a fast flying tool. It can go into space. It does not need air to fly. It carries its own fuel. This helps it go very high. It can take us to the moon! Can you look at the stars?
Early Reader · Change the reading level on the articleSatellite
A satellite is a machine in space. It flies around the Earth. It helps us talk to friends. It also tells us the weather. These machines help us every day. Do you like looking at the stars?
Early Reader · Change the reading level on the articleShip
A ship is a big boat. It moves on the water. It can carry many things. It can carry people, too. Ships help us trade and travel. Do you like the sea?
Early Reader · Change the reading level on the articleSimple machine
Machines help us move things. They make hard work easy. Some use a long bar. Some use a wheel. They help us lift heavy loads. You can use them too! Do you see machines at home?
Early Reader · Change the reading level on the articleSolar energy
The Sun gives us light and heat. This light helps plants grow food. We can use the Sun for power too. It can even heat our water. This helps our world stay clean. Do you like the warm sun?
Early Reader · Change the reading level on the articleSteam engine
A steam engine uses hot steam. The steam pushes a part inside. This part moves back and forth. This motion can do work. It can move big trains. It helps us move things. Can you hear the steam hiss?
Early Reader · Change the reading level on the articleTelecommunications
We can share news from far away. We use wires or air to send it. This helps us talk to friends. It helps us watch shows too. It is a big way to share. Can you talk to someone far away?
Early Reader · Change the reading level on the articleTelephone
A phone helps us talk. It lets us hear voices from far away. You can talk to a friend. It works using wires or air. This helps us stay close. Do you like to talk on the phone?
Early Reader · Change the reading level on the articleTelevision
A TV shows moving pictures. It also plays sound. You can watch news or games. It brings many things to your home. It is fun to watch with friends. Do you like to watch TV?
Early Reader · Change the reading level on the articleThomas Edison
Thomas Edison was a great maker. He made many new things. He made the light bulb. He also made a machine for sound. These things help us today. Do you like to make things too?
Early Reader · Change the reading level on the articleTrain
A train is a long line of cars. It runs on metal tracks. An engine pulls the cars along. Trains carry many people or things. They help us move fast. Do you like train rides?
Early Reader · Change the reading level on the articleVehicle
A vehicle helps us move. It can carry people. It can carry things too. We use cars and boats. Some even fly in the sky. Do you like to ride in a car?
Early Reader · Change the reading level on the articleVideo
Video shows moving pictures. It can have sound too. You see it on a TV. You can see it on a phone. It helps us learn and play. Do you like to watch videos?
Early Reader · Change the reading level on the articleWaste
This is a way to talk online. It lets friends share files. It does not use one big boss. Friends connect to each other instead. This keeps things safe and private. It is a fun way to chat. Do you like to chat with…
Early Reader · Change the reading level on the articleWeapon
Some tools are used to hurt. These can be simple things like rocks. Some are made to be tools for war. People have used them for a long time. They help people hunt for food. Can you think of a tool?
Early Reader · Change the reading level on the articleWheel
A wheel is round. It turns on a rod. It helps us move heavy things. Wheels make work easy for us. We use them every day. Do you see wheels?
Early Reader · Change the reading level on the articleWind power
Moving air can make power. This air turns big fans. The fans make electricity. We use it in our homes. It is a clean way to help. Do you feel the wind?
Early Reader · Change the reading level on the articleAbacus
An abacus helps you count. It has small beads on rods. You move the beads to do math. It does not need a plug or a battery. It is a fun way to learn numbers. Do you want to try counting with one?
Early Reader · Change the reading level on the articleAbrasive
Some things are very hard. They can rub things. This makes things smooth. It can also make them shape. You use it in toothpaste. It helps clean your teeth. Do you like shiny things?
Early Reader · Change the reading level on the articleAbstract machine
A computer model is like a plan. It shows how a machine works. It uses rules to change things. These rules help us learn. It makes hard things easy. Can you follow a plan?
Early Reader · Change the reading level on the articleAcademic journal
Smart people write books to share news. These books tell us about new things. They help us learn. They help us grow. We can read them on a screen. Do you like to learn new things?
Early Reader · Change the reading level on the articleAdvertising
People use ads to show new things. Ads tell us about a toy or food. They help us know what to buy. This helps many shops stay busy. Do you see ads every day?
Early Reader · Change the reading level on the articleAerospace engineering
People build things that fly. Some fly in the air. Some go into space. These machines help us travel far. They are very cool to see. Do you like to look at the sky?
Early Reader · Change the reading level on the articleAerospace manufacturer
People build things that fly. They make big planes. They also make rockets for space. These things help us travel far. They can even go to the stars. Do you like to fly?
Early Reader · Change the reading level on the articleAir conditioning
Air conditioning makes rooms feel cool. It takes heat away from inside. This helps us stay safe in hot weather. It makes hot places nice to live. We can stay cool and happy. Do you like the cool air?
Early Reader · Change the reading level on the articleAircraft carrier
A big ship is a home for planes. It has a long flat top. Planes land and take off there. This helps planes fly far away. It is a very large ship. Do you like planes?
Early Reader · Change the reading level on the articleAircraft engine
An engine helps planes fly. It gives the plane power. Some engines use fuel. Other engines use power from a battery. This helps us travel far. Do you like to fly in a plane?
Early Reader · Change the reading level on the articleAirline
An airline helps people fly. They use big planes. These planes carry people. They also carry boxes. Flying is fast. It helps us see the world. Have you ever flown in a plane?
Early Reader · Change the reading level on the articleAirport
An airport is a place for planes. Planes land and take off on long roads. They also park in big areas. People wait in buildings to fly. You can eat or shop there. Do you want to fly in a plane?
Early Reader · Change the reading level on the articleAirship
An airship is a big flying ship. It uses gas to float high. This gas is lighter than air. The people sit in a small car below. It can fly for a long time. Do you want to fly in one?
Early Reader · Change the reading level on the articleAir traffic control
People help planes fly safely. They sit in tall towers. They talk to pilots on the radio. This keeps planes far apart. It helps them stay safe. Do you like to fly in planes?
Early Reader · Change the reading level on the articleAkashi Kaikyo Bridge
This is a very big bridge. It goes over the sea. It helps cars get to new places. It is strong in big storms. We can see it glow at night. Do you like big bridges?
Early Reader · Change the reading level on the articleAlexander Graham Bell
Alexander Graham Bell was a smart man. He made the first telephone. This helps us talk to friends far away. He loved to learn new things. It is fun to invent! Do you like to build things?
Early Reader · Change the reading level on the articleAlibaba Group
Alibaba is a big company. It helps people buy things online. You can shop on its sites. It uses computers to work. Many people use it every day. It helps shops sell goods. Do you like to shop online?
Early Reader · Change the reading level on the articleAlpaca
Alpacas are soft animals. They live in high hills. They have thick hair. This hair keeps them warm. We can use their hair for clothes. They are very cute. Do you like alpacas?
Early Reader · Change the reading level on the articleAmateur radio
People use radios to talk to friends. They can talk far away. They can even talk to space! It is a fun way to learn. It helps us during big storms too. Do you like to talk on a radio?
Early Reader · Change the reading level on the articleAmazon (company)
Amazon is a big shop online. It sells many things. You can buy books and toys there. It also sells food. It helps people get things they need. Do you like to shop online?
Early Reader · Change the reading level on the articleAmbulance
An ambulance is a special car. It helps sick people. It carries them to a hospital. It has bright lights and loud sounds. This helps it move fast. It is a very helpful tool. Do you see them on the road?
Early Reader · Change the reading level on the articleAmmunition
Some tools use things to hit a target. These things can be small or big. They help tools work. They can even make a loud pop. We must be very careful with them. Do you see how many kinds there are?
Early Reader · Change the reading level on the articleAmplifier
An amp makes sounds louder. It takes a small signal. Then it makes a big signal. This helps us hear music. It helps us hear the radio. Do you like loud music?
Early Reader · Change the reading level on the article