A web page and interactive applet show how to compute the perimeter of a polygon. A polygon is shown that can be resized by dragging its vertices. As you drag, the perimeter is continuously recalculated. Text on the page explains that the perimeter is the sum of the sides. For those who prefer it, in a formula that is given. 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 reference book project at http://www.mathopenref.com.

This Demonstration shows 3D bar charts of the periodic table with various element property values.

An interactive applet and associated web page that show how to determine of one line is perpendicular to another in coordinate geometry. The principle used is that if two lines a re perpendicular to each other the slope of one is the negative reciprocal of the other. The applet shows to lines that the user can move. The slopes are continuously calculated as you drag them, and if the they are parallel they change color. The calculation is shown on screen updated continuously as you drag. The grid, axis pointers and coordinates can be turned on and off. The calculation display can be turned off to permit class exercises and then turned back on the verify the answers. The applet can be printed as it appears on the screen to make handouts. The web page has a full description of the concept of perpendicularity, a worked example and has links to other pages relating to coordinate geometry. 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.

This course provides the framework of financial planning by focusing on managing and organizing personal financial resources. It incorporates insurance planning which stresses the importance of protecting financial resources, investment planning for growth of resources, and long-term planning for old age survival.

Students will use the Phet Energy Forms and Changes simulations to design experiments.  The evidence from the experiments is used to support answers/explanations to the following questions:Does heat flow from hot to cold or cold to hot?What are some things that affect the rate of heat flow?Does an object get hot all at once or does the heat spread slowly from one place to another? 

PhET provides fun, free, interactive, research-based science and mathematics simulations. We extensively test and evaluate each simulation to ensure educational effectiveness. These tests include student interviews and observation of simulation use in classrooms. The simulations are written in Java, Flash or HTML5, and can be run online or downloaded to your computer. All simulations are open source (see our source code). Multiple sponsors support the PhET project, enabling these resources to be free to all students and teachers.

Explore what happens at the molecular level during a phase change. The three common physical states of matter (also called phases) are solid, liquid and gas. Matter can change phase with the addition or subtraction of heat. Molecules are always in motion. The molecules in a solid move more slowly than those in a liquid. When molecules are heated, they gain kinetic energy (motion). Kinetic energy can be transferred through molecular collisions.

See how light knocks electrons off a metal target, and recreate the experiment that spawned the field of quantum mechanics.

See how light knocks electrons off a metal target, and recreate the experiment that spawned the field of quantum mechanics.

In this activity, students observe fluid motion and the formation of convection cells as a solution of soap and water is heated. This procedure can be performed as a demonstration by the teacher, or older students can conduct the experiment themselves. A list of materials, instructions, and a description of the convective process are included.

How do scientists detect planets around distant stars? Use this model to explore how a star's movement and light intensity are affected by an orbiting planet. Explore the effects of changing the orbiting angle (tilt), type, and size of the planet on the star's velocity and light intensity. Use the habitability analyzer to determine whether the planet could harbor life.

This interactive site displays the organization and aspects of the plant, animal, and bacterial cell models through animations and text (requires Adobe Flash Player). Disclaimer: Host website is responsible for accessibility compliance. Educator is responsible for accommodations.

Explore what happens when a force is exerted on a polymeric plastic material. There are many different types of materials. Each material has a particular molecular structure, which is responsible for the material's mechanical properties. The molecular structure of each material affects how it responds to an applied force at the macroscopic level.

While working in groups to facilitate peer tutoring, students manipulate a hands-on, physical model to better comprehend the dynamics of plate kinematics.

Playground Physics is an iPad and Progressive Web application (app) developed by the New York Hall of Science. The app is accompanied by a supplemental Teacher Guide for middle school teachers. The Playground Physics curriculum is a six-week supplemental physics curriculum, designed to be used alongside any existing science curricula in the middle grades. It includes a teacher guide and student work, and maps to the NGSS and NYSSLS. The curriculum is focused around three different units which each explore a major concept in physics (motion, force and energy) through a specific type of physical play (catching a ball, jumping, swinging).

Playground Physics is particularly well suited to supporting diverse learners because it leverages students’ abilities to playfully ask and answer their own questions to connect academic content to what they notice, describe and analyze about their own individual actions. Additionally, the multimodal nature of the program, which uses videos and images as well as kinesthetic exploration to build understanding, is less text-dependent than more traditional physics instructional materials.

The students will play a classic game from a popular show. Through this they will see the probabilty that the ball will land each of the numbers with more accurate results coming from repeated testing.

Observe how molecules with hydrophilic and hydrophobic regions move in a mixture of oil and water, and the effects on potential energy.

Explore the role of polarity in the strength of intermolecular attractions. While all molecules are attracted to each other, some attractions are stronger than others. Non-polar molecules are attracted through a London dispersion attraction; polar molecules are attracted through both the London dispersion force and the stronger dipole-dipole attraction. The force of attractions between molecules has consequences for their interactions in physical, chemical and biological applications.

Explore how the types of atoms forming a bond affect the distribution of electrons and overall shape of the molecule.

An interactive applet and associated web page that demonstrate polygons. The applet shows a polygon which is initially an irregular convex pentagon. The user can drag any vertex and a message shows if it becomes concave. The user can also alter the number of sides from 3 to 99, the title changing to reflect it's name up to 12 sides. You can also make it regular, dragging a vertex then changes all vertices to maintain it as regular. The web page has many definitions and links to the various forms and orders of polygon. 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.