Number Sense:
From 20 to 100

In this lesson, we explore how numbers from 20 to 100 serve as a universal language that transcends borders and cultures. Understanding this numerical range is essential for navigating daily life on a global scale, from interpreting international weather reports in Celsius or Fahrenheit to managing currency in different countries. By mastering these numbers, students develop the ability to engage with global data, such as calculating ages, tracking time on a hundred-year scale (centuries), and understanding statistical trends in world populations. This context bridges the gap between abstract counting and the practical skills needed to participate in an interconnected world.