This week in math, first graders have been working with both nonstandard and standard units as we are learning about linear measurements. Working with nonstandard units, such as paperclips, students have measured various classroom objects. We focused on accuracy and consistency when aligning the tool with the object being measured – this is essential to getting a correct measurement.
After measuring with nonstandard units, we began to explore the concept of inches as a unit of length, using practical examples like the length of their pencils or books. They got familiarized with rulers, learning about the various parts, including the inch markings and subdivisions such as half inches and quarter inches. We discussed the difference between inches and centimeters as a unit of length. Students learned that many other parts of the world (including the continent of Europe that we learned about last week!) use centimeters rather than inches because they are based around the number 100. We know how helpful the number 100 is!
We then moved on to hands-on activities where students practiced measuring different objects in inches using rulers. They learned to align the starting point with the “0” mark on the ruler and read the measurement where the object ended. Through repeated practice and reinforcement, their accuracy improved over time.
They are comparing quantities determining which items are longer, shorter, taller, higher, or wider than others. Students have made comparisons between nonstandard and standard units, as well as comparisons among different standard units such as inches and centimeters. As we continue learning about linear measurement, first graders will use a variety of tools including rulers, tape measures, and yard sticks. They will practice accurate measurement, compare units, recognize and use abbreviations, and make estimations.
