Where did all the variables go? Scholars learn how to interpret an equation when they eliminate all variables during the solving process. They interpret the solution as infinite solutions or no solutions. 

Students determine that the relative concentration of copper ions in water can be determined by a color comparison. They make a copper (II) sulfate solution of a given concentration. Students dilute their initial solutions until their...

What better way to learn graphing inequalities than through discovering your own method! Class members use a discovery approach to finding solutions to inequalities by following steps that lead them through the process and...

How do people transport fresh water long distances to ensure everyone has access to it? The final lesson in the 10-part Fresh Solutions unit encourages individuals to design their own solution, or solutions, to that very problem. Groups...

Switching indoor water fixtures to low flow reduces water usage by more than 45 percent. This and other solutions to reduce water usage have both pros and cons. Scholars view videos of different solutions, discuss them in small groups,...

When is the last time you assigned your students only one problem? This seemly simple problem requires learners think like a mathematician and reason about how to solve this compound inequality in one variable. More than just using...

Four simple equations, each with two variables, try to get at the important question of reasoning about equations. The problem isn't to solve the equations, but to understand the nature of their solutions. These equations address the...

Double the fun of solving a linear equation with an activity that asks learners to first compete an assessment task graphing two linear equations to find the common solution. They then complete a card activity solving systems of...

Complex doesn't have to mean harder! Learners experiment with online software to determine the quadratic equations with complex solutions. They use the quadratic formula to solve equations with both real and complex solutions.

Five acidic and five basic solutions are listed for your chemistry apprentices to review. For each, they must state which atom or ion is being oxidized or reduced, and then name the oxidizing or reducing agent. Finally, they balance each...

Our young scientists have now specifically identified a problem, and this step helps them think of possible solutions. An outline, including guidelines, for brainstorming helps scholars stay on the right path. The resource includes...

One 17-ounce bottle of Cola requires around 46 gallons of water to produce. How is that possible? Young scientists learn about the hidden water used to produce everyday items. They research, discuss, and look for ways to reduce water...

This task includes scaffolding to support the introduction of the writing and graphing of linear inequalities. Then your geometry learners discover that writing down all possible combinations is not feasible so they are led to use...

Smart Solutions is the theme of a unit created to meet the needs of English language earners. Through a series of lessons, scholars follow a routine—move, speak, and listen— to cover topics including stores, shops, celebrations, pets,...

These attractive, clear slides summarize hydroponics.  They cover details concerning nutrients, solutions, flooding issues, media types, and commercial use.  

It's gettin' hot in here! An investigative activity has learners measure the heat of reaction in a virtual setting. After exploring the reaction, they attempt to create a solution at an exact temperature.

Ninth graders know how to solve a system of linear equations, but what happens when the system involves an exponential function? The instructional slideshow teaches viewers to determine solutions to systems of equations with linear...

Can your breath change the acidity in a liquid? A lesson begins with a demonstration that proves it can. Then scholars perform an experiment to determine if other gases can change the pH of liquids. Finally, they research how this...

For this buffer solution worksheet, high schoolers experiment with the addition of different solutions to a buffer solution and observe the changes in pH using a pH probe. High schoolers describe the differences between adding pure water...

Young scholars find the roots of quadratic equations. In this algebra lesson, students solve radical equations and identify the positive and negative roots. They graph and analyze their functions.

In this solutions, suspension and colloid worksheet, students complete a lab experiment in order to determine if a given mixture is a solution, suspension or colloid. They are given six vials and they record their observations of each...

Students investigate different fruits and vegetables for the presence of sugars. In this sugars and Fehling's solution lesson, students test the juice from an onion and a lemon for the presence of sugar by adding Fehling's solution and...

Learners explore matter by conducting an in class demonstration. In this liquid mixture lesson, students identify the difference between a solution in which a solid dissolves into liquid, and a suspension where the solid doesn't dissolve...

Can you go ice fishing in the ocean? Learners examine the freezing point of different saltwater solutions. Each solution has a different concentration of salt. By comparing the freezing points graphically, they make conclusions...