An interactive applet and associated web page that show the definition and properties of an ellipse. The applet has a draggable point that shows that the sum of the distances to the foci is a constant. The web page also has links to other pages defining the various properties of an ellipse and to some ellipse constructions. 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 optical properties of elliptical mirrors. Rays that pass through one focus of an ellipse always a reflected so they pass through the other focus. The ellipse can be resized by dragging, and light rays change to show that this is always true. The web page also has links to other pages defining the various properties of an ellipse and to some ellipse constructions. 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.

Throughout the year I have used this as a review for the end of each unit. I create five or six critical thinking questions that apply what we have been learning about. I print them on color paper and spread them around the room. I pair the students up, and have they move about the room solving the questions. I only have ten students in my class so I’m fortunate to have only five pairs at a time. I usually pair them up as sort of a strong and weak combination. This is an attempt to have them collaborate on the problems while using critical thinking.

This site offers engineering challenges with things you have at home. Kids learn from taking items from their everyday life and using them in new ways to do simple things. It helps them understand the world around them and how things work.

An interactive applet and associated web page that demonstrate the equation of a line in point-slope form. The user can move a slider that controls the slope, and can drag the point that defines the line. The graph changes accordingly and equation for the line is continuously recalculated with every slider and / or point move. The grid, axis pointers and coordinates can be turned on and off. The equation 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 the equation of a line in point - slope form, 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.

An interactive applet and associated web page that demonstrate the equation of a line in coordinate geometry. The equation is in the form y=mx+b. The user can move two sliders that control a and b. The graph changes accordingly and equation for the line is continuously recalculated with every slider move. The grid, axis pointers and coordinates can be turned on and off. The equation 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 the equation of a line, 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.

An interactive applet and associated web page that demonstrate equiangular triangles (all interior angles congruent). The applet presents an equiangular triangle where the user can drag any vertex. As the vertex is dragged, the others move automatically to keep the triangle equiangular. The angles and side lengths are updated continuously to show that the all interior angles are always congruent. 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 have the definition and meaning of 'equidistant' as applied to points. The applet shows to points and another that is equidistant from them no matter how you drag them around. User can also turn on the locus of the equidistant point, illustrating the definition of a line 'the locus of all points equidistant from two others' 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 equilateral triangles (all sides the same length). The applet presents an equilateral triangle where the user can drag any vertex. As the vertex is dragged, the others move automatically to keep the triangle equilateral. The angles are also updated continuously to show that the all interior angles are always congruent. 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 chart indicates the essential learning outcomes expected to be accomplished at the end of the year in K-10 math.

Tag Line: Building number sense one day at a time.

The site provides a number of estimation activities involving height, number of objects etc. The activities may include a photo or video to help students develop some reference to solve the activity. The answers are provided, but the idea is that students utilize their estimation skills to determine the appropriate answer.

The site also includes a blog, a relationship between some american common core standards and estimation activities, as well as information on clothesline math activities as well.

An interactive applet and associated web page that describe the Euler line. It shows a triangle whose vertices can be dragged. As you drag them, the centroid, circumcenter and orthocenter move appropriately, showing that they are always collinear, always lying on the Euler line. There are controls to individually turn on the construction lines for each center. This helps visualize the concept since if they are all drawn at once, the diagram would be hopelessly confused. The web page has a full description the Euler line and has links to separate pages which go into each center in depth. Applet can be enlarged to full screen size for use with a classroom projector. Diagram can be printed. This resource is a component of the Math Open Reference Interactive Geometry textbook project at http://www.mathopenref.com.

A PBS Learning Media resource that is perfect for pre-K kids. Topics from math, science to art provide early childhood resources to strengthen kids’ interest and sense of discovery.

An interactive applet and associated web page that demonstrate the exterior angles that are formed where a transversal crosses two lines. The applet shows the two possible pairs of exterior angles in turn when in animation mode. By dragging the three lines, it can be seen that the angles are supplementary only when the lines are parallel. When not in animated mode, there is a button that alternates the two pairs of angles. The text on the page discusses the properties of the angle pairs both in the parallel and non-parallel cases. 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.

Using an Arduino microprocessor, students will build an automated fish food feeder so fish can be fed when no one is at school?

This project involves learning how to do simple wiring of an LED, a buzzer, and a servo (motor) to a simple-to-use Arduino microprocessor.

Brought to you by Common Sense Media and Wide Open School, this site offers creative ideas/free activities to move, learn, relax, and connect as a family.

Find weekly activities, games, worksheets and videos in lots of areas: reading and writing, math, social studies, science, offline friendly, emotional well-being, arts/music/DIY, fitness, digital citizenship, life skills, English-Language Learners, virtual field trips, videos and events.

Brought to you by Common Sense Media and Wide Open School, this site offers creative ideas/free activities to move, learn, relax, and connect as a family.

Find weekly activities, games, worksheets and videos in lots of areas: reading and writing, math, social studies, science, offline friendly, emotional well-being, arts/music/DIY, fitness, digital citizenship, life skills, English-Language Learners, virtual field trips, videos and events.

Brought to you by Common Sense Media and Wide Open School, this site offers creative ideas/free activities to move, learn, relax, and connect as a family.

Find weekly activities, games, worksheets and videos in lots of areas: reading and writing, math, social studies, science, offline friendly, emotional well-being, arts/music/DIY, fitness, digital citizenship, life skills, English-Language Learners, virtual field trips, videos and events.

Brought to you by Common Sense Media and Wide Open School, this site offers creative ideas/free activities to move, learn, relax, and connect as a family.

Find weekly activities, games, worksheets and videos in lots of areas: reading and writing, math, social studies, science, offline friendly, emotional well-being, arts/music/DIY, fitness, digital citizenship, life skills, English-Language Learners, virtual field trips, videos and events.