Add different salts to water, then watch them dissolve and achieve a dynamic equilibrium with solid precipitate. Compare the number of ions in solution for highly soluble NaCl to other slightly soluble salts. Relate the charges on ions to the number of ions in the formula of a salt. Calculate Ksp values.

Add different salts to water, then watch them dissolve and achieve a dynamic equilibrium with solid precipitate. Compare the number of ions in solution for highly soluble NaCl to other slightly soluble salts. Relate the charges on ions to the number of ions in the formula of a salt. Calculate Ksp values. Arabic Language.

Students build a saltwater circuit, which is an electrical circuit that uses saltwater as part of the circuit. Students investigate the conductivity of saltwater, and develop an understanding of how the amount of salt in a solution impacts how much electrical current flows through the circuit. They learn about one real-world application of a saltwater circuit — as a desalination plant tool to test for the removal of salt from ocean water.

This is the first version of a task asking students to find the areas of triangles that have the same base and height, and is the most concrete.

This is the second version of a task asking students to find the areas of triangles that have the same base and height. This presentation is more abstract as students are not using physical models.

The purpose of this task is to provide an opportunity for students to reason about equivalence of equations. The instruction to give reasons that do not depend on solving the equation is intended to focus attention on the transformation of equations as a deductive step.

A template for developing openly licensed educational resources from Grossmont Union High School District.

The diary that Samuel Pepys (pronounced “peeps,” 1633-1703) kept from 1660 to 1669 is the most famous diary written in the English language. In part this is because Pepys was writing at a fascinating moment, and, living in London and working for the government, he was in a good position to see important historical events take place in real time. Pepys began writing his diary just weeks before the restoration of the monarchy in 1660, and he was even on the ship that was sent to bring Charles II back to England. He was an eyewitness to Charles’s coronation, to the Great Fire of London in 1666, to a terrible occurrence of the plague, and to the wars that England fought with the Dutch in that decade, wars that turned out to be crucially important to establishing England as the dominant naval power in the north Atlantic. And as an important figure in the administration of the Royal Navy, he became a participant as well in the machinery of the state.

This real world word problem requires students to figure out the scale ratio and unit rate.

Last year the Siuslaw 97J School District changed our food service operation from a national supplier (Chartwell’s) to in-house food service. Our Food Service Manager instituted an organic philosophy and wanted to source local produce. Utilizing our school garden program we now help supply fresh produce for our Siuslaw Elementary School cafeteria. Crop production is stronger in the 4/5 wing because of wind protection from the building. Florence experiences high winds and we are located close to the beach so we have constant sand blowing into our crops. The K-3 garden beds do not have the same protection as the 4/5 beds, and as a result have a lower yield. Our goal is to have students design and engineer wind barriers for these beds and then present the best solutions to our school board so that we can get funding to implement our ideas. This project can be used in any school with a garden by using preexisting barriers on a the school property. The unique environment of the school would dictate the lessons required to be adapted to fit the environmental needs of the community. If the school is lacking a garden, the students can focus on an at home garden project.

The task provides an opportunity for students to engage in Mathematical Practice Standard 4: Model with mathematics.

This course deals with the basic principles and design aspects of sanitary engineering infrastructure. This comprises: drinking water supply and treatment, sewerage and wastewater treatment. Study goals: Insight in technological aspects of the urban water infrastructure

This art history video discussion looks at Basilica of Santa Maria Maggiore, Rome, 5th century A.D.

The purpose of this task is to give students experience in using simulation to determine if observed results are consistent with a given model (in this case, the Ňjust guessingÓ model). Part (i) also addresses the role of random assignment in the design of an experiment and assesses understanding of this concept.

This task involves two aspects of statistical reasoning: providing a probabilistic model for the situation at hand, and defining a way to collect data to determine whether or not the observed data is reasonably likely to occur under the chosen model. When guessing between two choices, there is no reason to suspect that one outcome is more likely than the other. Thus, a model that assumes the two outcomes to be equally likely (such as flipping a coin) is appropriate.

This art history video discussion looks at Sarcophagus of Junius Bassus, marble, 359 C.E. (Treasury of Saint Peter's Basilica).

This art history video discussion looks at John Singer Sargent's "Carnation, Lily, Lily, Rose", 1885-86, oil on canvas (Tate Britain, London).

This task is an example of applying geometric methods to solve design problems and satisfy physical constraints. This task models a satellite orbiting the earth in communication with two control stations located miles apart on earthsŐ surface.

Fundamentals of satellite engineering design, including distributed satellite. Studies orbital environment. Analyzes problems of station keeping, attitude control, communications, power generation, structural design, thermal balance, and subsystem integration. Considers trade-offs among weight, efficiency, cost, and reliability. Discusses choice of design parameters, such as size, weight, power levels, temperature limits, frequency, and bandwidth. Examples taken from current satellite systems. Satellite Engineering introduces students to subsystem design in engineering spacecraft. The course presents characteristic subsystems, such as power, structure, communication and control, and analyzes the engineering trades necessary to integrate subsystems successfully into a satellite. Discussions of spacecraft operating environment and orbital mechanics help students to understand the functional requirements and key design parameters for satellite systems.

The context of this task is a familiar one: a cold beverage warms once it is taken out of the refrigerator. Rather than giving the explicit function governing this warmth, a graph is presented along with the general form of the function. Students must then interpret the graph in order to understand more specific details regarding the function.