MINI-LESSONS FOR THE CLASSROOM   What Is An Invention?   (SCIENCE/SOCIAL STUDIES)       Inventions All Around Us!   (SCIENCE/ART)       Top 10 Inventions   (MATH/LANGUAGE ARTS)       Inventions for the 21st Century   (HISTORY/LANGUAGE ARTS)     Inventions That Changed Our World Throughout history, people have imagined and then created new things to make their lives better, easier, and more enjoyable. From the wheel to penicillin to the computer, inventions continue to change the way we live. This theme unit introduces students to the amazing world of inventions — they'll learn about famous inventors, explore everyday inventions, discuss the "Top 10" inventions of all time, and even imagine a new invention for the 21st century. Each mini-lesson provides a step-by-step activity with links to the best online resources for kids.