In this lesson, students will represent mixed numbers with units of tens, ones, and tenths with number disks, on the number line, and in expanded form.

In this lesson, students will use meters to model the decomposition of one whole into hundredths. Represent and count hundredths.

In this lesson, students will model the equivalence of tenths and hundredths using the area model and number disks.

In this lesson, students will model mixed numbers with units of hundreds, tens, ones, tenths, and hundredths in expanded form and on the place value chart.

In this lesson, students will use understanding of fraction equivalence to investigate decimal numbers on the place value chart expressed in different units.

In this lesson, students will apply understanding of fraction equivalence to add tenths and hundredths.

In this lesson, students will add decimal numbers by converting to fraction form.

In this lesson, students will solve word problems involving the addition of measurements in decimal form.

In this lesson, students are asked to recognize the equivalence of fractional tenths and decimals and to do simple decimal addition to find lengths both shorter and longer than 1.

In this activity, students will conduct a survey to identify the environmental issues (in their community, their country and the world) for which people are concerned. They will tally and graph the results. Also, students will discuss how surveys are important when engineers make decisions about environmental issues.

This task engages students in considering money as fractions. Students are required to employ other mathematical operations to successfully complete this task, such as adding multidigit numbers and identifying the value of various coins.

This short video and interactive assessment activity is designed to give fourth graders an overview of - hundredths.

This short video and interactive assessment activity is designed to give fourth graders an overview of - tenths.

This short video and interactive assessment activity is designed to give fourth graders an overview of - thousandths.

Students use potatoes to light an LED clock (or light bulb) as they learn how a battery works in a simple circuit and how chemical energy changes to electrical energy. As they learn more about electrical energy, they better understand the concepts of voltage, current and resistance.

In this interactive, students practice using decimal notation for fractions as they compete in a puppy chase against students from around the world.

In this interactive, students practice decimal conversion for fractions as they compete against students from around the world.