This short video and interactive assessment activity is designed to teach fifth graders about converting inches to yards.
This short video and interactive assessment activity is designed to teach fifth graders about converting kilograms and grams into grams.
This short video and interactive assessment activity is designed to teach fifth graders about converting miles to feet.
This task provides an opportunity to work on the Standard for Mathematical Practice 3 Construct Viable Arguments and Critique the Reasoning of Others.
Unit 3: Unit Rates and Percentages
Lesson 4: Converting Units
In grade 4, students began converting units of measurements by multiplying. The work in grade 5 expanded to include conversion by dividing, but was still restricted to units within the same measurement system. In this lesson, students progress to converting units that may be in different systems of measurement, using ratio reasoning and recently-learned strategies such as double number lines, tables, and multiplication or division of unit rates.
This short video and interactive assessment activity is designed to teach fourth graders about converting years into weeks.
This short video and interactive assessment activity is designed to teach fourth graders about converting years to days.
This short video and interactive assessment activity is designed to give fourth graders an overview of comparison of weights (english units).
In this Cyberchase video segment, Matt uses subtraction to help Digit figure out how much time he has left in a cooking contest with Hacker.
While the task as written does not explicitly use the term "unit rate," most of the work students will do amounts to finding unit rates. A recipe context works especially well since there are so many different pair-wise ratios to consider.
These games support student development of the concept of ordered pairs as they play to win each game.
A brief refresher on the Cartesian plane includes how points are written in (x, y) format and oriented to the axes, and which directions are positive and negative. Then students learn about what it means for a relation to be a function and how to determine domain and range of a set of data points.
In this optics/mathematics activity, learners use two hinged mirrors to create a kaleidoscope that shows multiple images of an object. Learners discover that the number of images reflected in the mirrors depends on the angle between the mirrors. Learners also observe that when they set the hinged mirrors on top of a third mirror, they create a reflector that always sends light back in the direction from which it came. Use this activity to introduce basic principles of light and optics including angle of reflection and angle of incidence.
The applets in this section allow you to see how different bivariate data look under different correlation structures. The Movie applet either creates data for a particular correlation or animates a multitude data sets ranging correlations from -1 to 1.
Unit 1: Scale Drawings
Lesson 2: Corresponding Parts and Scale Factors
This lesson develops the vocabulary for talking about scaling and scaled copies more precisely (MP6), and identifying the structures in common between two figures (MP7).
Specifically, students learn to use the term corresponding to refer to a pair of points, segments, or angles in two figures that are scaled copies. Students also begin to describe the numerical relationship between the corresponding lengths in two figures using a scale factor. They see that when two figures are scaled copies of one another, the same scale factor relates their corresponding lengths. They practice identifying scale factors.
A look at the angles of scaled copies also begins here. Students use tracing paper to trace and compare angles in an original figure and its copies. They observe that in scaled copies the measures of corresponding angles are equal.
Countdown Fractions in this Nrich game offers a motivating context in which to practice calculating with fractions. There is usually more than one way of hitting the target, which offers an opportunity for rich discussion on the merits of alternative methods.
This task suggests ways to incorporate counting circles into classroom activities.
Students practice counting sequences by standing in a circle and counting one by one.
This short video and interactive assessment activity is designed to teach second graders about counting cubes and creating a place value diagram.
This activity allows students to practice counting.