In this lesson series, students will design and conduct an experiment using microwaves to measure either the speed of light or the wavelength of the microwaves emitted by the appliance. Essential questions include: What are the types of light? How is the speed of light measured? Why do all types of light travel at the same speed?

An interactive applet and associated web page that demonstrate the definition of a line. The applet presents two points and a line that passes through them extending to infinity in both directions. As the points a re dragged the line moves but it is never possible to reveal a line end. See also the entries for line segment and ray. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

The interactive explores the ways that poets choose line breaks in their writing. After viewing the demonstration, students are invited to experiment with line breaks themselves.

Students groups act as aerospace engineering teams competing to create linear equations to guide space shuttles safely through obstacles generated by a modeling game in level-based rounds. Each round provides a different configuration of the obstacle, which consists of two "gates." The obstacles are presented as asteroids or comets, and the linear equations as inputs into autopilot on board the shuttle. The winning group is the one that first generates the successful equations for all levels. The game is created via the programming software MATLAB, available as a free 30-day trial. The activity helps students make the connection between graphs and the real world. In this activity, they can see the path of a space shuttle modeled by a linear equation, as if they were looking from above.

This Open Middle task asks students to create a table of values that represents a linear function.

An interactive applet that allows the user to graphically explore the properties of a linear functions. Specifically, it is designed to foster an intuitive understanding of the effects of changing the two coefficients in the function y=ax+b. The applet shows a large graph of a quadratic (ax + b) and has two slider controls, one each for the coefficients a and b. As the sliders are moved, the graph is redrawn in real time illustrating the effects of these variations. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

An interactive applet and associated web page that demonstrate a bisector of a line segment. The applet shows a fixed line segment and another line that bisects it. The second line's endpoints can be dragged, but the line adjusts itself so that it always bisects the fixed line. Applet can be enlarged to full screen size for use with a classroom projector. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

In this activity, students explore the relationship among angles formed by a transversal and a system of two lines. In particular, they consider what happens when the two lines are parallel versus when they are not.

This lesson unit is intended to help teahcers assess how well students are able to interpret speed as the slope of a linear graph and translate between the equation of a line and its graphical representation.

This video segment from Between the Lions uses a line of laughing Lions to help build vocabulary and illustrate the meaning of words that typically challenge young children.

This activity deals with the concept of rhyming. This concept is not immediately understood by most students and needs to be explained first with ample examples. The activity consists of groups of 3 words two of which rhyme and one doesn't. Students read the words or listen to the instructor and select the word that doesn't rhyme. They are then directed to pick a specific letter from the "wrong" word and write it in a separate column. After completing the assignment students unscramble the letters trying to form a meaningful expression related to listening which in this case is "I'm all ears".

Students brainstorm strategies to guide their listening as they describe and label music of different genres.

This is a challenging fraction comparison problem. The fractions for this task have been carefully chosen to encourage and reward different methods of comparison.

In this lesson, students will distinguish the literal and non-literal meanings of verbal and written content in different contexts. The lesson targets adult learners of English who have demonstrated Grades 3- 4 or B-C reading level. Learners will demonstrate an understanding of idioms by using context clues in the sentences to help figure out the meanings of idioms, by drawing out idioms without using words or letters, by giving written tips using idioms, and by creating greeting cards.

This lesson was designed for English 9 students as an introduction to literary devices at the beginning of a short stories unit. The ultimate goal will be that students can analyze a story, explaining how an author uses these devices to create literature, but this lesson specifically focuses on domain-specific vocabulary.

In this minilesson, students practice identifying and purposefully using vocabulary in persuasive writing that is intended to have an emotional impact on the reader.

In this number line task students must treat the interval from 0 to 1 as a whole, partition the whole into the appropriate number of equal sized parts, and then locate the fraction(s).

In this Cyberchase video segment, Matt and Jackie must figure out which combination of knob and key will get them one step closer to retrieving the Black Crystal.

In this blog post and the included lesson plan, Graham Fletcher and Joe Schwartz explore thinking conceptually about the standard division algorithm. In his lesson, Joe Schwartz scaffolds long division using tape diagrams.