This short video and interactive assessment activity is designed to teach third graders about dividing by 7.

This short video and interactive assessment activity is designed to teach fourth graders about dividing by 8.

This short video and interactive assessment activity is designed to teach third graders about dividing by 8.

This short video and interactive assessment activity is designed to teach third graders about dividing by 9.

This short video and interactive assessment activity is designed to teach fifth graders about dividing by 9.

This task requires students to recognize both "number of groups unknown" and "group size unknown" division problems in the context of a whole number divided by a unit fraction.

This short video and interactive assessment activity is designed to teach fourth graders about number patterns based on the multiplication table.

This short video and interactive assessment activity is designed to teach third graders about division terms.

This short video and interactive assessment activity is designed to teach third graders about dividing by 1 digit numbers to find work.

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

This short video and interactive assessment activity is designed to teach fifth graders about division of lengths (metric units).

The purpose of this task is to introduce the idea of exponential growth and then connect that growth to expressions involving exponents. It illustrates well how fast exponential expressions grow.

In this activity, students will test whether the color of a material affects how much heat it absorbs.

Through a teacher-led discussion, students realize that the food energy plants obtain comes from sunlight via the plant process of photosynthesis. They learn what photosynthesis is, at an age-appropriate level of detail and vocabulary, and then begin to question how we know that photosynthesis occurs, if we can't see it happening. Elodea is a common water plant that students can use to directly observe evidence of photosynthesis. When Elodea is placed in a glass beaker near a good light source, bubbles of oxygen will be released as products of photosynthesis. By counting the number of bubbles that rise to the surface in a five-minute period, students can compare the photosynthetic activity of Elodea in the presence of high and low light levels.

Students learn about the amazing adaptations of the ptarmigan to the alpine tundra. They focus one adaptation, the feathered feet of the ptarmigan, and ask whether the feathers serve to only keep the feet warm or to also provide the bird with floatation capability. They create model ptarmigan feet, with and without feathers, and test the hypothesis on the function of the feathers. Ultimately, students make a claim about whether the feathers provide floatation and support this claim with their testing evidence.

Students learn about biomimicry and the engineering design process as they design and build model ptarmigan feet.

This problem allows the student to think geometrically about lines and then relate this geometry to linear functions. Or the student can work algebraically with equations in order to find the explicit equation of the line through two points (when that line is not vertical).

This task is designed as a follow-up to the task F-LE Do Two Points Always Determine a Linear Function? Linear equations and linear functions are closely related, and there advantages and disadvantages to viewing a given problem through each of these points of view. This task is intended to show the depth of the standard F-LE.2 and its relationship to other important concepts of the middle school and high school curriculum, including ratio, algebra, and geometry.

This problem complements the problem ``Do two points always determine a linear function?''