Launch the “Suitable Units of Measurement” Notebook file and match the appropriate tool to the object to be measured (use the measuring cup or thermometer for the milk bottle). Invite volunteers to come to the SMART Board to drag and drop the labels into position next to the matching images. Encourage students to give clear reasons for each of their choices. Discuss the importance of using the correct tools for measuring. Prompt students to consider what would happen if the correct tool was not used. Ask: What would you use to measure the weight of a paper clip? Could you use bathroom scales? What would you use to measure the thickness of a paper clip? Could you use a ruler with no markings for millimeters?
Complete with a teacher's page PDF, a "Measuring Things" reproducible, and a launch-and-learn Notebook file, this mini-lesson helps to achieve the following learning objectives:
• Select and use metric units of measure.
• Read and interpret scales on a range of measuring tools.
This mini-lesson meets the following Common Core State Standards for Mathematics:4.MD.1: Know relative sizes of measurement units within one system of units including km, m, cm; kg, g; lb, oz.; l, ml. Within a single system of measurement, express measurements in a larger unit in terms of a smaller unit.5.MD.1: Convert among different-sized standard measurement units within a given measurement system, and use these conversions in solving multi-step, real world problems.This mini-lesson also meets the following NCTM Standards:• Understand such attributes as length, area, weight, volume, and size of angle and select the appropriate type of unit for measuring each attribute.• Understand the need for measuring with standard units and become familiar with standard units in the customary and metric systems.• Carry out simple unit conversions, such as from centimeters to meters, within a system of measurement.• Understand that measurements are approximations and understand how differences in units affect precision.• Select and apply appropriate standard units and tools to measure length, area, volume, weight, time, temperature, and the size of angles.• Understand both metric and customary systems of measurement.• Understand relationships among units and convert from one unit to another within the same system.