Explore forces, energy and work as you push household objects up and down a ramp. Lower and raise the ramp to see how the angle of inclination affects the parallel forces acting on the file cabinet. Graphs show forces, energy and work.

Explore forces and motion as you push household objects up and down a ramp. Lower and raise the ramp to see how the angle of inclination affects the parallel forces. Graphs show forces, energy and work.

This lesson unit is intended to help teachers assess how well students are able to distinguish between rational and irrational numbers. In particular, it aims to help teacher identify and assist students who have difficulties in: classifying numbers as rational or irrational; and moving between different representations of rational and irrational numbers.

This lesson unit is intended to help teachers assess how well students reason about the properties of rational and irrational numbers. In particular, this unit aims to help teachers identify and assist students who have difficulties in: finding irrational and rational numbers to exemplify general statements; and reasoning with properties of rational and irrational numbers.

Create your own sandwich and then see how many sandwiches you can make with different amounts of ingredients. Do the same with chemical reactions. See how many products you can make with different amounts of reactants. Play a game to test your understanding of reactants, products and leftovers. Can you get a perfect score on each level?

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

Explore what makes a reaction happen by colliding atoms and molecules. Design experiments with different reactions, concentrations, and temperatures. When are reactions reversible? What affects the rate of a reaction?

In his historic March 2008 speech on race, Barack Obama explained some of the barriers to opportunity that created the racial wealth divide. In this lesson, students take a deeper look at the lingering economic effects of slavery, segregation and other forms of institutionalized bias.

This Teacher's Guide provides compelling questions to frame a unit of study and inquiry projects on the Reconstruction Era, includes NEH sponsored multimedia resources, activity ideas that include use of newspapers from the time and interdisciplinary approaches to bring social studies, ELA, and music education together, and resources for a DBQ and seminar.

When people are asked about doing something for social justice, they often say: “I have to find out a little more about it before I take some action.” This lesson will create an awareness that actions are important in the struggle for justice.

This lesson plan is the ninth in the "Incredible Bridges: Poets Creating Community" series. It provides a video recording of the poet, Joy Harjo, reading the poem "Remember." The companion lesson contains a sequence of activities for use with secondary students before, during, and after reading to help them enter and experience the poem.

This lesson unit is intended to help teachers assess how well students are able to: translate between decimal and fraction notation, particularly when the decimals are repeating; create and solve simple linear equations to find the fractional equivalent of a repeating decimal; and understand the effect of multiplying a decimal by a power of 10.

This lesson unit is intended to help teachers assess how well students: are able to use frequency graphs to identify a range of measures and make sense of this data in a real-world context; and understand that a large number of data points allow a frequency graph to be approximated by a continuous distribution.

This lesson unit is intended to help teachers assess how well students are able to interpret data using frequency graphs and box plots. In particular this unit aims to identify and help students who have difficulty figuring out the data points and spread of data from frequency graphs and box plots. It is advisable to use the lesson: Representing Data 1: Frequency Graphs, before this one.

This lesson unit is intended to help teachers assess how well students are able to translate between graphs and algebraic representations of polynomials. In particular, this unit aims to help you identify and assist students who have difficulties in: recognizing the connection between the zeros of polynomials when suitable factorizations are available, and graphs of the functions defined by polynomials; and recognizing the connection between transformations of the graphs and transformations of the functions obtained by replacing f(x) by f(x + k), f(x) + k, -f(x), f(-x).

This lesson unit is intended to help teachers assess how well students are able to: recognize and visualize transformations of 2D shapes; and translate, reflect and rotate shapes, and combine these transformations. It also aims to encourage discussion on some common misconceptions about transformations.

Learn about the physics of resistance in a wire. Change its resistivity, length, and area to see how they affect the wire's resistance. The sizes of the symbols in the equation change along with the diagram of a wire.

Learn about the physics of resistance in a wire. Change its resistivity, length, and area to see how they affect the wire's resistance. The sizes of the symbols in the equation change along with the diagram of a wire.

For advanced undergraduate students: Observe resonance in a collection of driven, damped harmonic oscillators. Vary the driving frequency and amplitude, the damping constant, and the mass and spring constant of each resonator. Notice the long-lived transients when damping is small, and observe the phase change for resonators above and below resonance.

A noose is found hanging from a goalpost on a high school campus.

A swastika, 20 feet in diameter, is burned into the pavement at a junior high school.

A group of white high school students dresses in banana suits for a basketball game and taunts their majority-black rival with racial slurs.

A Sikh student has his turban pulled off and hair cut by fellow students.

Your school has plans and protocols in place to respond to fires, severe weather, medical emergencies, fights and weapons possession. But what about school incidents like those listed above that involve bigotry and hate? Are plans in place to respond to a bias incident or hate crime? Too often these plans are created in the moment during the actual crisis. Bias incidents are far too complex for on-the-fly planning; an early misstep can heighten tension and damage chances for long-term success.