This short video and interactive assessment activity is designed to teach fifth graders about determining whether various shapes have lines of symmetry.

This short video and interactive assessment activity is designed to teach third graders about listing all factors.

This short video and interactive assessment activity is designed to teach fourth graders about listing common multiples.

This short video and interactive assessment activity is designed to teach fifth graders about multiple rounds of division - long division word problems.

This short video and interactive assessment activity is designed to teach fourth graders about dividing 3 and 4 digit numbers by 2 digit numbers.

This short video and interactive assessment activity is designed to teach fifth graders about dividing 3 and 4 digit numbers by 2 digit numbers.

Students will be introduced to Chinese Circus Arts and San Francisco’s Circus Center. They will learn about the origins of Chinese acrobatics and circus arts, and be inspired to study China’s history, and explore how circuses differ across cultures. Students will engage in group oral discussion, hands-on individual and group projects, as well as critical reflection on personal expressions.

Lecture Objective: Introduce geography as a potentially deep determinant of growth and expose students to questions in the cutting edge of the field.

The lesson incorporates a few MRU videos about geography and growth from our Principles of Macroeconomics and Development Economics video courses. We also mix in discussion prompts, exercises, practice questions, graphs and charts, and pre- and post-class assignments. Finally, we provide supplementary resources such as additional data sources, relevant news articles and blog posts, and two podcast episodes

Lecture Objective: Introduce students to the super simple Solow model. By the end of the lesson, students should be able to identify inputs to growth, solve for the steady state, and identify the factors that lead to conditional convergence.

The lesson incorporates a number of MRU’s videos about the Solow model and conditional convergence from our Principles of Macroeconomics video course. We also mix in discussion prompts, exercises, practice questions, graphs and charts, and pre- and post-class assignments. Finally, we provide supplementary resources such as additional data sources, relevant articles and blog posts, an episode of Planet Money, and even an interview with Robert Solow himself.

This short video and interactive assessment activity is designed to teach fourth graders about matching the time to the clock.

The goal of this video lesson is to teach students about new and exciting ways of holding an election that they may not be aware of. Students will learn three different methods of voting: plurality, instant runoff, and the Borda count. They will be led through a voting experiment in which they will see the weakness of plurality when there are three or more candidates. This lesson will show that not every voting system is perfect, and that each has its strengths and weaknesses. It will also promote thought, discussion, and understanding of the various methods of voting.

The goal of this video lesson is to teach students about new and exciting ways of holding an election that they may not be aware of. Students will learn three different methods of voting: plurality, instant runoff, and the Borda count. They will be led through a voting experiment in which they will see the weakness of plurality when there are three or more candidates. This lesson will show that not every voting system is perfect, and that each has its strengths and weaknesses. It will also promote thought, discussion, and understanding of the various methods of voting.

This short video and interactive assessment activity is designed to teach fifth graders about single object length ii (english units).

The main aim of this lesson is to show students that distances may be determined without a meter stick—a concept fundamental to such measurements in astronomy. It introduces students to the main concepts behind the first rung of what astronomers call the distance ladder. The four main learning objectives are the following: 1) Explore, in practice, a means of measuring distances without what we most often consider the “direct” means: a meter stick; 2) Understand the limits of a method through the exploration of uncertainties; 3) Understand in the particular method used, the relationship between baseline and the accuracy of the measurement; and 4) Understand the astronomical applications and implications of the method and its limits. Students should be able to use trigonometry and know the relation between trigonometric functions and the triangle. A knowledge of derivatives is also needed to obtain the expression for the uncertainty on the distance measured. Students will need cardboard cut into disks. The number of disks is essentially equal to half the students in the class. Two straight drink straws and one pin per disk. Students will also need a protractor. The lesson should not take more than 50 minutes to complete if the students have the mathematical ability mentioned above. This lesson is complimentary to the BLOSSOMS lesson, "The Parallax Activity." The two lessons could be used sequentially - this one being more advanced - or they could be used separately.

The main aim of this lesson is to show students that distances may be determined without a meter stick—a concept fundamental to such measurements in astronomy. It introduces students to the main concepts behind the first rung of what astronomers call the distance ladder. The four main learning objectives are the following: 1) Explore, in practice, a means of measuring distances without what we most often consider the “direct” means: a meter stick; 2) Understand the limits of a method through the exploration of uncertainties; 3) Understand in the particular method used, the relationship between baseline and the accuracy of the measurement; and 4) Understand the astronomical applications and implications of the method and its limits. Students should be able to use trigonometry and know the relation between trigonometric functions and the triangle. A knowledge of derivatives is also needed to obtain the expression for the uncertainty on the distance measured. Students will need cardboard cut into disks. The number of disks is essentially equal to half the students in the class. Two straight drink straws and one pin per disk. Students will also need a protractor. The lesson should not take more than 50 minutes to complete if the students have the mathematical ability mentioned above. This lesson is complimentary to the BLOSSOMS lesson, "The Parallax Activity." The two lessons could be used sequentially - this one being more advanced - or they could be used separately.

In this Cyberchase video segment, the CyberSquad must measure the length of the rope that will lower Digit from the ceiling to remove the voice box from a statue of Hacker.

In this lesson students will see the different types of evidence scientists use to understand evolutionary relationships among organisms. They will first practice by using shared physical characteristics to predict relationships among members of the cat family and then use this approach to predict primate relationships. They will compare their predictions to evidence provided by analyzing amino acid sequences and build a phylogenetic tree based on these sequences. Finally, they will look at the tree in the context of time in order to see divergence times.

In this lesson students will see the different types of evidence scientists use to understand evolutionary relationships among organisms. They will first practice by using shared physical characteristics to predict relationships among members of the cat family and then use this approach to predict primate relationships. They will compare their predictions to evidence provided by analyzing amino acid sequences and build a phylogenetic tree based on these sequences. Finally, they will look at the tree in the context of time in order to see divergence times.

This patient education program discusses meningitis including the causes, symptoms, diagnosis, treatment, complications, infectiousness, and prevention of the disease through vaccination. This resource is a MedlinePlus Interactive Health Tutorial from the National Library of Medicine, designed and developed by the Patient Education Institute.

This short video and interactive assessment activity is designed to teach fifth graders about converting meters to centimeters.