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 20 of 86
A computer uses lists to remember things. It links a name to a thing. One name can have one thing. This helps the computer find things fast. It is like a smart list. Can you find your toys in a list?
Early Reader · Change the reading level on the articlePeople want to get things from space. They can find rocks in the sky. These rocks have metals inside. We can use them to build things. It is very hard to do. Do you want to visit space?
Early Reader · Change the reading level on the articleA big bridge goes over the water. It helps cars cross the river. It is very, very long. You can ride in a car on it. It is a cool sight to see. Have you seen a big bridge?
Early Reader · Change the reading level on the articleAn astrolabe is a tool for stars. It is a metal disc. It helps people find their way. It can show where planets are. It tells us the time too. It is very old. Can you find a star?
Early Reader · Change the reading level on the articleWe send ships into space. These ships go far away. They fly past our air. It is very cold and hot there. This helps us learn. Do you want to go to space?
Early Reader · Change the reading level on the articleSome telescopes work as a team. They use many small parts. These parts act like one big tool. This helps us see far stars. It makes pictures very clear. Can you imagine a giant eye in the sky?
Early Reader · Change the reading level on the articleAsus makes many tools. They make computers and phones. They also make screens. These things help us work and play. It is a big company. Do you use a computer?
Early Reader · Change the reading level on the articleSome machines work in a special way. They do not wait for a beat. They work as soon as they can. This helps them go fast. It also helps them save power. Can you imagine a fast machine?
Early Reader · Change the reading level on the articleA long time ago, men built a machine. It could do math very fast. It used small parts to work. This helped people solve big problems. It was like a very early computer. Do you like math too?
Early Reader · Change the reading level on the articleThe Atatürk Dam is very big. It sits on a river. The dam makes power for homes. It also helps plants grow. It is a huge wall of rock. Do you like big rivers?
Early Reader · Change the reading level on the articleTrains run under the city of Athens. They help people get around fast. This keeps the air clean. Some stations even have art. You can see old things there too. Do you like riding trains?
Early Reader · Change the reading level on the articleThe Atlas was a giant computer. It was very fast. It was one of the best in the world. It helped many people learn. Do you like computers?
Early Reader · Change the reading level on the articleA machine gives you money. It is a bank machine. You use a plastic card. You type in a secret code. It helps you get cash. It works even when banks are closed. Do you use these machines?
Early Reader · Change the reading level on the articleThis is how TV works. It sends shows to your home. It makes the picture look very clear. This helps you see well. It is very cool! Do you like to watch TV?
Early Reader · Change the reading level on the articleA big bridge goes over the water. It helps many cars cross. It is very long. The bridge helps people get to work. It is a famous sight. Do you like big bridges?
Early Reader · Change the reading level on the articleAudi makes fast cars. These cars are from Germany. They have a logo with four rings. The rings show how companies joined together. Many people like these cars. Do you like cars?
Early Reader · Change the reading level on the articleA talking book is a story you hear. You can listen to it. It helps people who cannot see well. It is fun to listen to stories. Do you like to hear stories?
Early Reader · Change the reading level on the articleComputers use special ways to save music. These ways make files small. Small files are easy to send. This helps you listen to songs. It is like magic for your ears! Do you like to listen to music?
Early Reader · Change the reading level on the articleSome people need help to talk. They can use signs with their hands. They can use books with pictures. Some use tools that speak for them. This helps them tell us things. It is a great way to share. How do you talk to…
Early Reader · Change the reading level on the articleYou can see magic on your screen. It adds fake things to your real room. You might see a new chair. It looks real in your house! This helps you see things before you buy them. Can you imagine seeing a dragon in your…
Early Reader · Change the reading level on the articleAugust Horch made cars. He was a smart builder. He started a big car company. This company is now called Audi. It helps us drive today. Do you like cars?
Early Reader · Change the reading level on the articleThe ABC is a big group. It makes shows for people. It has radio and TV. It tells news to the land. This helps us stay smart. Do you like watching shows?
Early Reader · Change the reading level on the articleThe Autobahn is a big road in Germany. It is for cars to drive on. Many parts have no speed limit. This helps people travel far. It is a very fast road. Do you like fast cars?
Early Reader · Change the reading level on the articlePeople use a computer to draw. It helps them plan big things. They can draw houses or roads. It makes work easy for them. Do you like to draw too?
Early Reader · Change the reading level on the articleThis tool measures tiny tilts. It uses light to see. It looks at a mirror. It checks if things are straight. This helps us build big machines. It is very smart. Can you see the light?
Early Reader · Change the reading level on the articleSome machines work all by themselves. They follow a set of rules. They move from one step to the next. This helps them solve problems. It is like a lock with a code. Can you think of a machine?
Early Reader · Change the reading level on the articleSome tools can fire many times. They use energy to load new parts. This happens very fast. It can get very hot. This can make the tool break. We must be careful. Do you see how it works?
Early Reader · Change the reading level on the articlePower plants make light for us. They must make just enough power. If we use too much, the machines slow down. The system fixes this fast. This keeps our lights on. It helps everything work well. Do you use lights at…
Early Reader · Change the reading level on the articleSome machines can move on their own. They follow special rules. They can look like people or animals. They can even play music. These machines are fun to watch. Do you like moving toys?
Early Reader · Change the reading level on the articleA repair shop fixes cars. People go there when cars break. Workers fix the parts. This keeps us safe on the road. It is a very helpful place. Have you seen a car shop?
Early Reader · Change the reading level on the articlePeople design how cars look. They draw new shapes. They pick pretty colors too. This makes cars fun to see. It helps us ride in style. Do you like bright cars?
Early Reader · Change the reading level on the articlePeople work to build cars. They make bikes and trucks too. They test them to stay safe. This helps you ride in a car. It is a big job. Do you like cars?
Early Reader · Change the reading level on the articleAn autopilot helps fly a plane. It does some of the work. This helps the pilot rest. The pilot still watches the sky. It makes flying safer for us. Can you imagine flying a plane?
Early Reader · Change the reading level on the articleA tuk tuk is a small car. It has three wheels. An engine helps it go. It carries people in many places. It is a fun way to ride. Do you want to ride in one?
Early Reader · Change the reading level on the articleMusic tools can help us sing. This tool fixes notes. It makes singing sound very good. It can also make a voice sound like a robot. Many singers use it today. Do you like robot sounds in songs?
Early Reader · Change the reading level on the articleA small engine helps big machines. It makes power for lights and tools. It can even start the big engines. This helps planes and ships work well. It is very useful. Do you want to see one?
Early Reader · Change the reading level on the articleBig plants make the power we use. They must work when we need them. Sometimes they need to stop for fixes. This helps them stay strong. We want them to work a lot. Do you turn on lights at home?
Early Reader · Change the reading level on the articleThis tool sees tiny bits of light. It turns light into power. It can find very small lights. This helps us see far away. It is a smart tool. Do you like to see far away?
Early Reader · Change the reading level on the articleAn avatar is a picture of you online. It can be a small photo. It can also be a character in a game. You can make it look like you. Or you can make it look new. What would your picture look like?
Early Reader · Change the reading level on the articleThese are very fast trains. They zoom across Spain. They can go as fast as a bird. These trains help people travel. They are very fun to ride. Would you like to ride one?
Early Reader · Change the reading level on the articlePlanes use tools to fly. These tools help pilots talk. They also help pilots find their way. These tools help keep everyone safe. It is like a brain for the plane. Do you like to fly in a plane?
Early Reader · Change the reading level on the articleAxel Springer made many newspapers. He lived in a place called Germany. He started a very big company. His papers helped many people read the news. He wanted to share stories every day. Do you like to read the news?
Early Reader · Change the reading level on the articlePeople use many ways to carry babies. Some use soft wraps to hold them close. Others use carts with wheels to push them. This helps babies move around safely. It is a great way to travel. How would you like to ride?
Early Reader · Change the reading level on the articleA backpack is a bag for your back. You wear it with two straps. It helps you carry things. It can carry books or food. It makes heavy things easier to hold. Do you use a backpack at school?
Early Reader · Change the reading level on the articleA backslash is a small mark. It looks like a tilted line. Computers use it to work. It helps tell the computer what to do. It is a helpful tool. Do you see it on a keyboard?
Early Reader · Change the reading level on the articleSailors used a tool to find their way. It used the sun. They kept the sun at their back. They looked at a shadow. This helped them see where they were. It was a smart tool. Can you find the sun in the sky?
Early Reader · Change the reading level on the articleA backup is a copy of your work. It stays in a safe place. This helps if you lose your files. It keeps your things safe. We can use it to fix things. Do you have a backup?
Early Reader · Change the reading level on the articleRules help us talk to computers. These rules show how to write code. They use special signs to show patterns. This helps people make new computer languages. It is like a map for words. Can you learn a new way to talk?
Early Reader · Change the reading level on the article