Oxford Discover 3 - Unit 13: How do inventions change our lives? - Lesson 1
<p><strong>1. Word: </strong></p><p>lever, ramp, wedge, wheel and axle, screw, light bulb, doorknob, stairs, axe, hammer</p><p> </p><p><strong>2. Classify and Categorize</strong><br>Classify and categorize to group things that are similar. When you read, put the items you read about into groups. The items in each group should be similar in some way.