How do erasers erase pencil marks

The only problem is as with old erasers that they crumble why doing so and their residue has to be removed. This is often done with a broad brush. It does not leave behind eraser residue like art gum eraser, and because of the lasts longer, but it loses its efficacy and resilience because particles that it erases stay inside it.

Kneaded eraser can be shaped into a fine point to erase small details; it can be shaped into a larger surface and work as a stamp, and it can work as a blotter to lighten a darker area covered with graphite. They cannot erase larger areas because they deform while rubbing. Because of the way it works it does not smudge or damage work in progress. In other regards, it works very similarly to kneaded eraser. Electric eraser is basically an eraser fastened to a rotor of a small electric motor.

The motor rotates the eraser at a uniform speed which erases the surface with much less damage than with hand. Products like magic erasers can take marks off of a number of surfaces, but give your standard pink pencil eraser a try on some of those scuffs.

You might be surprised at how effective it can be at erasing more than just pencil marks. About 75 percent of the pencils sold in America are painted yellow [source: Ritter ]. I learned something new about pencils while researching this article. No, not that pencil lead isn't lead I knew that fact already ; rather I learned about the pencil sandwich -- the industry term used to describe how pencil wood is placed around the graphite insert.

I did, however, also learn that there's a reason I prefer a soft, kneaded eraser over erasers of any other flavor: It actually does the job you expect an eraser to do.

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Everyday Innovations. How do erasers erase? Erasers have come a long way since the early days of using moist bread to eradicate errors.

Use erasers to remove graphite, ink Sister Jane Aug 10, I just completed a Thinkfinity seminar on Monday so I have just recently been introduced to the marvels of Wonderopolis! I will inservice the other teachers about this great website and we will introduce Thinkfinity with Wonderopolis to all of the parents on Back to School Nite! Wonderopolis Aug 10, Andrea Keller Aug 9, I am So excited about using Wonderopolis this year for so many reasons! Teaching children with autism and other very special needs I am always looking for something that will help in telling stories, imagining, and using descriptive words.

I can't wait to use Wonderopolis and see what thoughts I can get my students to express! Wonderopolis Aug 9, We appreciate all of our educator Wonder Friends and are grateful for the thought and time that went into your ideas! Dee Sypherd Aug 9, I'm really excited about the inquiry and vocabulary aspects of Wonderopolis! I plan to use it for cooperative learning team building opportunities. Teams will read the initial question and work together to make predictions before reading the article.

After teams share their ideas, they will read the article. Teams or individuals will use the vocabulary list to pick a word for their word collection. On occasion, we will also use the day's topic as a springboard for further investigation! Erin Gannon Aug 9, As a school with a health focus, we take time out every day to share a healthy snack. While the food is handed out, we read over the Wonder together. As the kids eat, they talk about it at their tables. The discussions are always great!

If the subject really strikes a chord, we tweet the kids' opinions or spend some time writing in our journals about it. Suzanne Aug 8, I like to use Wonderopolis for my Challenge Question -- I post "Wonders" and let my students go look up the answers -- great for research and discovery of an amazingly Wonderful site!

Dorene Tabat Bates Aug 8, I plan to use Wonderopolis this year to introduce Thinkfinity to teachers. I am going to show them how they can use the vocabulary and questions to promote literacy. Also to use the Wonders as daily question and prediction starters. Wonderopolis Aug 8, Traci Porter Aug 8, There are a couple of ways I use the Wonder of the Day.

Then he will fill out a T-chart to record the differences learned and share that information with the class. I also have a link to Wonderopolis posted on my blog for easy access to all of the fantastic information! Traci Porter Lincoln Trail Elem. School N. Spencer School Corp. Wendy Daniel Aug 8, My district, Wilson North Carolina, has just started using Thinkfinity and through the training given by the site I found and explored the great things with wonderopolis.

I plan to use this site with my middle school students in many ways. I will use these creative facts to encourage critical thinking and responding each day as a warm up, they can read about the facts, respond in their journals and then discuss how this could relate to our curriculum.

This site will be great to work with common core standards and make learning relevant to their lives. The erasers will be a great reminder that learning is never ending, that trial and error can be ok because it helps us develop and grow. Marie mso Snow Aug 8, This summer I had the opportunity to explore Wonderopolis - it is so engaging and full of visuals.

This is perfect for my ELL population! I would faciliatate navigation through the website, have the family choose one activity to explore and create a project at home. Students will share during "show and tell" sessions in class. Angie O Aug 8, Will be featuring clips once a week on the morning announcements. Hoping to start a sort of Wonder Investigation Team where kids answer questions submitted by other kids.

No, I'm not associated with the author and yes, it is easily tweakable for older kids! Sandyh50 Aug 8, This is my first time visiting Wonderopolis and I love it! I am a 4th grade teacher and would use it in my homeroom time. Later on when we do personal journals, I will have them respond to what they saw and read! Thanks for the chance to win some awesome erasers!

Karole Warfield Aug 8, Wonderopolis works WONDERFUL for my homeroom block to engage interest and combat behavioral issues and the tendency to have to be yak, yak, yaking at the kids to find something to do. With Wonderopolis, they are engaged and we are able to have a discussion afterwards.

Debbie Selfridge Aug 8, Wonderopolis is the BEST site ever!! I am at an elementary school that is an IB school - inquiry and critical thinking is what it's all about. So when I found Wonderopolis I thought I had struck gold! It is perfect for the end of the school day. The students are so excited to share what they already know, we then watch the video, and then talk about the "did you know" info and the word bank.

They often go home with a challenge to bring back more info for the next day's morning meeting. Maria Caplin Aug 8, I am excited to start my year off using Wonderopolis in my classroom with my morning warm up. It is fun to have the wonder up and have the students come into the room unpack their book bags, hand in their HW and begin thinking and talking about the wonder of the day.

If we have time we watch the video and then later in the day we will come back to the wonder and read the article as a class to see if we were correct about our guesses. Karyn Lewis Aug 8,