Q: While working on your garage door, make sure to wear a long-sleeved shirt, thick pants or jeans, and heavy duty gloves. These will help keep your skin safe from cuts and other injuries. To avoid injuries caused by falling objects, your garage door should be in its vertical position while you are working on the rails. If your door is misaligned and will not shut properly, close it as much as you can. If you have an automatic door that refuses to close, turn off the garage door opener and pull the door shut yourself. If you're adjusting the tracks on an automatic garage door, disable the garage door opener before you start working. For most doors, you can do this by simply pulling the emergency release handle located near the front of back of the overhead track. For model specific information, consult your garage door's user manual.
A: Put on protective clothing. Close the garage door before you start. Turn off the garage door opener if necessary.

Article: The best sources for scrap aluminum are old machine parts. Car cylinder heads, transmission cases, water pump housings and pistons are all great examples. More common sources are things like beer and pop cans, furniture frames, home siding, window frames, and turkey and pie pans. However, these sources tend to be weaker alloys that have lots of impurities, which means that they create more slag and oxidize quickly. An easy way to melt aluminum cans and prevent oxidizing is to add them to a pool of already molten aluminum. When you are working around extremely high temperatures, it is important to wear proper safety gear. When handling molten metal, you should wear a thick and long-sleeved shirt, pants, an apron, a face shield or glasses, and leather gloves. These things will prevent molten metal from burning your skin. Because molten aluminum can give off noxious gasses, you should also wear a respirator. When working with molten aluminum, some alloys will give off noxious fumes. Because of this you will want to work in a well-ventilated space or outdoors. This will also help keep you cool while working around extreme heat and avoid dehydration or heat stroke. If you begin feeling sick, have a headache, or are dizzy, turn down the foundry and take a break. Go to a cool place and drink some water. Before you begin melting aluminum, make sure that you have the necessary tools for handling molten metal. You will need a pair of metal tongs, a metal strainer or stirring rod, a crucible, and a foundry. Things like the foundry and crucible can be made at home or bought at a store or online. Because of the relatively low temperature necessary to melt aluminum, it can be melted in a variety of unsafe methods outside of a foundry. Avoid melting aluminum in large bonfires or on BBQ grills. These methods are less controlled and can lead to a fire or injury. If you are new to working with molten metals, be sure to work with a more experienced person before attempting to melt aluminum.
Question: What is a summary of what this article is about?
Find proper pieces of aluminum. Wear proper safety equipment. Find an open or well-ventilated space. Use proper tools. Be safe.

Q: Students can learn a lot from actively participating in class. One way that you can encourage participation is by having constructive class discussions. Ask open-ended questions so that students have to give more than a yes or no answer. Don't ask questions with a set answer in mind. Discussions should help students explore different ideas. Younger kids can start to learn critical thinking by answering questions. You could try, "What are some ways to show kindness?" You'll get lots of different answers! For example, you could ask, "Why is it so important that we take steps to protect the environment?" You could also try, "Do you think the U.S. should get involved in trying to solve problems in other countries? Why or why not?" In addition to discussion, you can try lots of other ways to help students get involved in class. Anything that gets the students doing something new for a few minutes is good. You can easily adjust activities according to the subject you teach. For almost any subject, you could try short in-class writing assignments. This will give students a break from listening to you talk and give them some time to learn more actively. Say, "Okay, everyone spend 5 minutes writing about what you think the key points of today's topic. When you're done, we'll share our thoughts as a large group." Ask students to relate the topic to their own lives. For example, "Write a paragraph about what kinds of things your family does to help the environment." Try Stand Up Sit Down. For example, if you are trying to teach the difference between proper nouns and common nouns, you can have students stand up if the word you say is a proper noun and sit down if it is a common noun. You can apply this to many subjects, including math. Try having students stand up if a number is prime and sit down if it is not. Working together can help students see material in a new way. It can also make things more fun! In addition to assigning group projects, you can find other creative ways to help students interact with one another. Try Think-Pair-Share. Give students a question, and give them a few minutes to think about their answer. Then, have them pair up and share their answers with each other. Finally, have each pair share their answers with the whole class. This works great with high school and college students. Play a matching game. Hand out a note card with a word or phrase on it and have students get up and find their match. You can do this with rhyming words, synonyms, problems/solutions, or anything that you want! Elementary school kids can have lots of fun with this one. Getting out of the classroom is a great way to help students connect to material! Field trips are a great way to bring some excitement to the topic you're teaching. Make sure that the field trip clearly relates to what you are teaching. For example, if you've been learning about environmental issues, take students to a self-sustaining farm. If you've been teaching about the solar system, take a trip to a planetarium. Make sure to follow all school policies when you're planning a field trip. For high school and college students, constructive debates are a great way for students to connect with the material. During discussions, encourage students to share opposing viewpoints. For example, if you are talking about whether or not peaceful protests are constructive, have students clearly explain their viewpoints. Make sure that students remain civil. No name calling, raised voices, or insults! If things start to get heated, wrap up the debate. Say, "We obviously have lots of strong feelings on this. To wrap up, take 5 minutes to write down what you feel are the key points on this issue."
A:
Facilitate class discussions with thought-provoking questions. Try in-class activities. Use activities that require interaction with other students. Take a field trip. Encourage debate if you are teaching high school or college courses.