EngageNY
Distributing Expressions
You know how to factor expressions; now it's time to go the opposite way. Scholars learn to write algebraic expressions in expanded form using the distributive property. A problem set helps them practice the skill.
Concord Consortium
Dissolving Experimental
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...
Shodor Education Foundation
Polar Coordinates
Polar opposites might not work together—but polar coordinates do! The interactive provides learners the opportunity to graph trigonometric and algebraic functions using polar coordinates. The program takes either individual data points...
101 Questions
Blob Jump
For every action, there is an equal and opposite reaction. In the case of the blob, that reaction is a trip several feet in the air! Learners begin by watching the world-record blob jump. They then analyze the flight of the person using...
GNS Science
Think like a Geologist: 1
How well do pupils play the role of geologist? Test their abilities in the first installment of a two-part series. Presented with a series of rock formation diagrams, learners write stories to match what they see in the diagrams. The...
Amani Project
Harmony Break! Mood Shifting
The fifth activity in the Amani Project series, another Harmony Break, has participants demonstrate a mood shift. They begin by drumming in a way that indicates their current feelings. They then model a change in mood by transitioning...
EngageNY
Using the Identity and Inverse to Write Equivalent Expressions
The fifth installment in the series of 28 lessons helps math scholars explore the result of adding opposite numbers and multiplying reciprocals. Through this exploration, they develop a working definition of identity and inverse properties.
Pingry School
Determination of the Molar Mass of an Unknown Acid
Acids and bases have a love-hate relationship. They balance each other so nicely, but they are complete opposites! Learners use these concepts and titration to calculate the molar mass of an unknown substance. The experiment...
Pingry School
Heat of Reaction and Hess's Law
Melting and burning might seem like opposites, but both exist as common examples of exothermic reactions. Scholars work with three different exothermic chemical reactions to determine the enthalpy changes. They measure and mix chemicals,...
Media Smarts
Marketing to Teens: Gender Roles in Advertising
Young learners explore gender roles in advertising by taking an ad campaign they have seen which is specifically directed to one gender, and redesigning the campaign to target the opposite gender. After leading a guided discussion about...
Florida Center for Reading Research
Phonics: Letter Recognition, Clip-A-Letter
Young scholars show what they know about the alphabet. With two circles—one surrounded by capital letters and one with lowercase—pupils use clothespins to match letters, case to case or the opposite.
Curated OER
Coordinate Graphs
As you introduce coordinate graphs to scholars, be sure to use guided worksheets like this one. Using an example for guidance, they write the coordinates of five points on a graph, each distinguished as a shape symbol. Next, scholars do...
Curated OER
The Simplest Form of Fractions
There are two parts to this fractions drill. Each of the first 32 fractions can be written in simpler terms, and scholars get some guidance as they are given either the denominator or numerator of the equivalent fraction. Review this by...
Curated OER
Statements and Questions
Teach your class the differences between statements and questions with a simple activity. After reading four statements, third graders rewrite the sentences as questions. They do the opposite in the last section. A helpful activity for...
Curated OER
Attract or Repel?
Opposites attract with a fun science experiment on magnets. With a short paragraph on background knowledge, the lab sheet prompts third and fourth graders to choose which pairs of magnets will attract, and which pairs will repel. A...
Perkins School for the Blind
The Country Egg
Because most children with visual impairments don't reach and grab things at a young age the way sighted children do, they need additional supports to build up their fine motor skills. Here, they work on the pincer grasp, using their...
Illustrative Mathematics
Area of a Trapezoid
Here is a straightforward example of how to apply the Pythagorean Theorem to find an unknown side-length of a trapezoid. Commentary gives additional information on proving that the inside of the trapezoid is a rectangle, but is...
Center for Math and Science Education
Volcano Model
When middle school earth science classes are covering volcanoes, they can cut out and construct a miniature model of a stratovolcano and its surrounding town. From the town side, the external features of the volcano appear. On the...
University of Washington
Using Modeling to Demonstrate Self-Assembly in Nanotechnology
Do polar opposites attract? After an introduction on the polarity of molecules, pupils are asked to design a self-assembling model using materials with different polarity. The challenge should motivate learners to develop a workable...
West Contra Costa Unified School District
Law of Sines
Laws are meant to be broken, right? Learners derive the Law of Sines by dropping a perpendicular from one vertex to its opposite side. Using the Law of Sines, mathematicians solve for various parts of triangles.
PhET
Balloons and Static Electricity
Like all electricity, static electricity flows at the speed of light, or 186,282 miles/second. The interactive simulation shows how like charges repel like charges and opposites attract. The user can choose either one or two balloons, a...
Bowels Physics
Magnetic Fields and Forces
Every knows that opposites attract! Here's a presentation that uses this background knowledge to explain magnetic fields and forces. The resource also explains the shape of magnetic fields and how to determine the direction of forces.
National Institute of Open Schooling
Electrochemistry
In an electrolytic cell, electrical energy is converted into chemical energy, the exact opposite of a battery! Lesson 15 in a series of 36 explores electrochemistry. Participants begin by reading and discussing oxidation/reduction...
CK-12 Foundation
Equations of Perpendicular Lines
Investigate how the equation y = -1/x relates to perpendicular lines. Pupils align an arrow using an interactive so it is perpendicular to a bow string. A set of challenge questions helps learners discover slopes of perpendicular...
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