In this project, students analyze the costs of gasoline nationwide. They also investigate the cost-effectiveness of purchasing a new hybrid vehicle as opposed to purchasing a new vehicle that runs solely on gasoline.

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This module discusses the hydrologic cycle and its impacts on the planet Earth. Additionally, the module addresses connections between the hydrologic cycle, climate and the impacts humans have had on the cycle.

A slide deck of mathematical questions that revolve around an image. Contains six grade level aligned questions, standards alignment across related domains to demonstrate a potential progression of questions across grade, and related “After the Image” questions and activities to do at home.

This lesson will provide information that will prove the concept of sine and cosine is equal to the complementary angles of a right triangle. The lesson will examine the proper techniques for writing trigonometric ratios. The lesson will enhance background knowledge of proportions as well as use the terminology of means and extremes. This lesson results from the ALEX Resource Gap Project.

This task illustrates the process of rearranging the terms of an expression to reveal different aspects about the quantity it represents, precisely the language being used in standard A-SSE.B.3.

This rich task is an excellent example of geometric concepts in a modeling situation and is accessible to all students. In this task, students will provide a sketch of a paper ice cream cone wrapper, use the sketch to develop a formula for the surface area of the wrapper, and estimate the maximum number of wrappers that could be cut from a rectangular piece of paper.

The purpose of this task is to engage students, probably working in groups, in a substantial and open-ended modeling problem. Students will have to brainstorm or research several relevant quantities, and incorporate these values into their solutions.

In the first video segment, we present a cartoon model of a weighted chain, which can be regarded as an approximation for a polymer under tension (e.g. a strand of DNA being stretched out using optical tweezers). The Hamiltonian and partition function for this system are described in the second segment. Finally, in the third segment, we calculate the average energy and elongation of the chain.

This short video and interactive assessment activity is designed to teach second graders an overview of rectangles, squares, circles and triangles.

This short video and interactive assessment activity is designed to teach third graders an overview of rectangles, squares, circles and triangles.

This short video and interactive assessment activity is designed to give fifth graders an overview of rectangles, squares, circles and triangles.

This short video and interactive assessment activity is designed to teach first graders an overview of rectangles, squares, circles and triangles.

This short video and interactive assessment activity is designed to teach fifth graders about selecting the quotient with the correct number of digits.

This short video and interactive assessment activity is designed to teach fourth graders about selecting the quotient using given statements.

This is a video and assessment exercise aimed at helping first graders identify incorrect subtraction.

This short video and interactive assessment activity is designed to teach second graders about selecting the incorrect subtraction sentence (numbers up to 20).

This short video and interactive assessment activity is designed to teach second graders about selecting the correct addition sentence.

This short video and interactive assessment activity is designed to teach third graders about finding the incorrect equations.

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

This short video and interactive assessment activity is designed to teach second graders about identifying greater and lesser amounts.