In this rational number worksheet, high schoolers add and subtract fractions containing variables. They find common denominators and solve for the unknown. This four-page worksheet contains eighteen problems. Answers are listed on the...

You mean the square root of five and five don't have the same value? Learners estimate the value of irrational roots. As they practice estimating the value, they increase their understanding of roots. The lesson is the fourth in a series...

The best part of learning about equilibrium is that nothing changes. Young chemists observe four demonstrations during this lesson: equilibrium in a saturated solution, equilibrium with an acid-base indicator, equilibrium with cobalt...

There is no I in team. Seven team problems provide classmates the opportunity to work with a partner on a task. Projects span the course and require pupils to apply their knowledge. Tasks range from writing the algorithm in English to...

Encourage your classes to be laundry helpers! Learners explore the chemistry of stain removal with a lab investigation. By identifying the components of the stain, they identify the most effective solute for its removal.

Halving is not always so simple. Small groups build a cube and then determine how to construct a cube that is half the size. Groups create two cubes, one that is the correct size and another that would be an alternative solution. To...

Help learners find joy in facing mathematical challenges. The questions posed on this learning exercise encourage young mathematicians to utilize skills learned throughout a geometry unit, and to apply themselves and persevere...

Micelles consist of an aggregate of molecules in a colloidal solution. The simulation presents two different ways the molecules assemble into micelles based on the polarity of the solution in which they are placed. Scholars can set the...

Review word problems and decimals with a worksheet that features everyday problems for your students to solve. Six problems provide space for both work and the solution, reinforcing the importance of showing one's work in word problems....

Tomorrow's engineers visit an intriguing website about inventions that have changed the way we live. Biographies of child inventors on the suggested website aren't easy to find, so make sure to find some stories to share in place of...

Students solve problems using PEMDAS. In this algebraic equations lesson, students evaluate expressions using real number properties. They play "Math Jeopardy" to reinforce the order of operations.

Given a value of one trigonometric function, it is easy to determine others. Learners use the periodicity of trigonometric functions to develop properties. After studying the graphs of sine, cosine, and tangent, the lesson plan...

After reading on the topic of their paper, high schoolers work in pairs to assess how to write powerful, precise thesis statements. The introduction contains three statements: a universal statement, a bridge statement, and a thesis...

Scholars are introduced to the characteristics of a legend. They read and discuss Old Father Story Teller by Pablita Velarde. Then, in groups, they write and illustrate a poem based on one of the legends from the book. This lesson plan...

Elementary learners identify the main elements of story structure and form questions to summarize their reading. They listen as the teacher reads a story and then write questions to determine (1) main characters, (2) setting, (3)...

If you need a homework assignment for your chemistry class, add this one to the possibilities. This assignment is composed of six questions including the identification of oxidizing and reducing agents, recognizing different redox...

Groups write and evaluate expressions for various phone plans and scenarios to find which is the best deal. They then compare different approaches to writing expressions for the same scenario and discuss the concept of equivalent...

Learners calculate the percent of a number.  This one-page instructional activity contains 10 problems. Answers are provided.

The rule is add before multiplying, even with matrices. Pupils use a slider to change the scalar multiplying the sum of two matrices. The interactive displays the resulting solution matrix, and requires scholars answer five questions...

Many scientists attempted alchemy for hundreds of years before a full understanding of metals became clear. Scholars take a penny and, through two different chemical reactions, make it appear to turn into silver and later gold. They...

Here is a practice worksheet that contains 16 problems on simplifying complex fractions. The problems start out basic and gradually be come more complex. There is an example included with two different solution methods shown. 

Strive for perfection. Based on peer feedback, groups identify ways to improve their prototypes of the solution to the plastics problem. Members must come up with at least two ideas for improvements. This is the eighth instructional...

Why does like dissolve like? While in many cases opposites attract, the same cannot be said for chemistry! Solution scholars take an up-close look at the dissolving process with a customizable interactive. The resource allows users to...

Get a better grasp of the intended content. The six free-response questions provide insight into the purpose of the AP® Calculus content. Two questions have real-world context while the remaining are void of context. The items range from...