An interactive applet and associated web page that deals with the area of a kite, (a quadrilateral with two distinct pairs of equal adjacent sides). The applet shows a kite and the user can reshape it by dragging any vertex. The other vertices move automatically to ensure it always remains a kite. As the vertices are dragged, the area is continuously recalculated and displayed. The kite is filled with a grid of unit squares so that the students can estimate the area. The on-screen calculation can be hidden until the estimates are done. The web page lists two different ways to compute the area of a kite. 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.

A web page and interactive applet showing the ways to calculate the area of a parallelogram. The user can drag the vertices of the parallelogram and the other points change automatically to ensure it remains a parallelogram. A grid inside the shape allows students to estimate the area visually, then check against the actual computed area, which is continuously recomputed and displayed. The text on the page gives three different ways to calculate the area with a formula for each. The applet uses one of the methods to compute the area in real time, so it changes as the rhombus is reshaped with the mouse. A companion page is http://www.mathopenref.com/parallelogram.html showing the definition and properties of a parallelogram 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 explain the area of a triangle. The applet shows a triangle that can be reshaped by dragging any vertex. As it changes, the area is continually recalculated using the 'half base times height' method. The triangle has a fixed square grid in its interior that can be used to visually estimate the area for later correlation with the calculated value. The calculation can be hidden while estimation is in progress. The text page has links to a similar page that uses Heron's Formula to compute the area. 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 problem-based learning module, students will 'dig' for fossils in a digital environment, using the advanced graphing techniques of line-of-best-fit and piecewise functions to look for different kinds of trends in the health of the history of the earth. They will apply this information to their knowledge of the laws of superposition and index fossils to form a complete analysis in the historical health as well as to predict where we are going in the future.

This article discusses how to use murals as an interdisciplinary, cooperative activity to blend science, art, and math concepts.

In this lesson, students will compare two fractions with the same denominator by reasoning about their size, using area and length models, and using the >, < symbols.

The story of "“Humpty Dumpty" has been around for a very long time.  Long ago one idea that came to the light was that of a large cannon that fell and could not be put back together again.  It is fun to compare fiction and to make predictions about what might have really happened.  Most students will in their backgrounds relate to this captivating story.  

Students will recognize and sort 2 dimensinal shapes based on their attributes using a tree map.

This set of resources is from Tools 4 NC Teachers.

This file contains a set of 6 lessons to be used during the first week(s) of school to develop students' mathematical mindsets. Lessons include:
Lesson 1: What is Math?
Lesson 2: Mathematicians Work Together
Lesson 3: Mathematicians Cooperate
Lesson 4: Mathematicians Ask Questions
Lesson 5: Mathematicians Learn from Mistakes
Lesson 6: Mathematicians Persevere

This resource is part of Tools4NCTeachers.

Math games are fun, motivating, and provide opportunities for students to build number concepts, reasoning, and fluency. These games may be used as math stations or as whole group learning opportunities. This file contains directions and materials for Cluster 2 math games.

Resource to help students learn how to solve comparison word problems through a fun interactive game.

An interactive applet and associated web page that show how to construct a 30 degrees angle with a compass and straightedge. The animation can be single-stepped or run as a continuous movie. 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 show how to construct a 45 degrees angle with a compass and straightedge. The animation can be single-stepped or run as a continuous movie. 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 show how to construct a 60 degrees angle with a compass and straightedge. The animation can be single-stepped or run as a continuous movie. 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 the properties of a cube. A 3-D cube is shown in the applet which can be interactively manipulated using the mouse. Research has shown that some younger students have difficulty visualizing the parts of a 3D object that are hidden. To help with this, the student can rotate the cube in any axis simply by dragging it with the mouse. It can also be 'exploded' - where a slider gradually separates the faces to reveal the ones behind. The cube can also be made translucent so you see through it to the other side. Applet can be enlarged to full screen size for use with a classroom projector, and printed to make handouts. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

Students will build and launch Magnus Effect gliders and measure the distance they fly. They will analyze the data to judge which material gives the glider the most distance. Then they may do the same process for other variables.

This lesson is Day 10 in a series of 12 lessons around fraction equivalences and comparisons.

This video lesson serves as a review of equpartitioning in order to determine the fractional part of an area or length. This is a necessary foundational skill for comparing and finding equivalent fractions.

This lesson is Day 12 in a series of 12 lessons around fraction equivalences and comparisons.

Use your math skills to help detectives solve the crime. This video lesson reviews fractions of an area, fractions on a number line, and equivalent fractions. No materials are required.

This lesson is Day 1 in a series of 5 lessons around U.S customary measurement.

This 3rd grade video lesson introduces the U.S. customary measurements for length: inches, feet, and yards. In this lesson, students will learn benchmarks (visuals) for measuring in inches, feet and yards when they don't have standard measurement tools available.

This lesson is Day 1 in a series of 12 lessons around fraction equivalences and comparisons.

This video lesson encourages students to reason about and visualize fractions. The lesson focuses on the ideas that fractions are fair shares and that fractions can be compared. This lesson assumes that students have some initial experiences with fractions.