![](https://k-5impactnewsgk-1.mheducation.com/wp-content/uploads/2020/05/IS_K-1_NEWS_MAY_2020_001P.jpg)
A laser is a thin beam of light. People use lasers all the time. You may have a laser at home. A DVD player uses a laser to read a DVD. A cashier uses a laser to read bar codes.
Photo Credit: ktsdesign/Shutterstock
September is national mushroom month. Mushrooms are important. What are … read more
Madeleine Albright has died. She was the first woman to … read more
April 22nd is Earth Day. People celebrate nature on Earth … read more
©2017 McGraw-Hill Education. All Rights Reserved.