(ES) Math Open Ref-This website includes animations of geometry concepts including constructions and transformations: http://www.mathopenref.com/

(ES) Reflection Video-Improv Everywhere is an improvisation group that creates interesting videos of large, organized improvisations. This video has sets of twins mirroring each other on the New York subway. It is a great introduction video for a unit on transformations.http://improveverywhere.com/2008/07/06/human-mirror/

(KR) Vector Addition - This interactive simulation allows students to experiment with different ways of viewing vector addition and allows them to distinguish which methods they find most useful in understanding the translations. http://phet.colorado.edu/en/simulation/vector-addition

(NP) This is an amazing site for problems - Problem Attic - You pick the problems, it makes a worksheet and you can save or print them. The problems come from past Regents exams in NY and problems are grouped by math topic. Easy to use. Just create a free login and password and you're ready to go! http://www.problem-attic.com/ Read an overview at http://blog.algebra1teachers.com/2012/11/problemattic.html

(ES) Two-Column Proofs-Geometry students often struggle with two-column proofs. This website offers students about 30 proofs to practice. It is interactive and it will provide immediate feedback to students, informing them if the order in which they listed statements and reasons is correct. http://feromax.com/cgi-bin/ProveIt.pl

(ES) Centroid Application-This article, written by the National Oceanic and Atmospheric Administration, describes the centroid of the United States population. The article explains that the centroid of the United States population is calculated after every census in order to better understand the movement of the population (National Oceanic Atmospheric Administration 2011). The article includes sections on how the centroid is calculated, why the information is useful, and where the centroid is currently located.

(KR) – Rotation Transformations – This interactive website is a great tool to use when introducing rotations. It allows the students to make their own predictions and observations without the teacher graphing the rotations over and over again. http://www.active-maths.co.uk/whiteboard/3transform/rotate_shapes2.html

(KR) – Dilation Transformations – This interactive simulation allows students to recognize the impact the scale factor and center point has on a figure. It is a great tool to use to introduce the topic and encourage student discover. http://mathopenref.com/dilate.html

(KR) – Tessellations – This hands-on website allows students to determine whether regular polygons can form regular tessellations or semi-regular tessellations (when tessellated with another regular polygon). The students can discover whether overlaps or gaps will be created and it’s a fun way to get students involved during class. http://nrich.maths.org/content/id/4832/polygons.swf

(KR) - Transformation Project - This project has students create a flipbook using transformations (translations, reflections, rotations, dilations)! For extra excitement, and possibly extra credit, students can be encouraged to create a timed PowerPoint Presentation and watch their animation come to life! Attached is the detailed rubric/assignment and a PowerPoint Presentation from students whom gave their consent to share their wonderful project.

Switch it up and have students use their mobile devices to learn about quadrilaterals in a scavenger hunt. Students will complete tasks and answer questions while learning the properties of quadrilaterals, parallelograms, trapezoids, and kites. Print the necessary pages from the SMART Notebook or print the .pdf file and post the 6 stations around the room for groups along with the codes to begin and end the scavenger hunt.
Download the notebook file:

http://www.problem-attic.com/ Read an overview at http://blog.algebra1teachers.com/2012/11/problemattic.html

Glencoehas a website that explains the application of loci with earthquakes. The video explaining this real life application is short but interesting. http://www.glencoe.com/sites/texas/student/mathematics/assets/interactive_lab/geometry/G_09/G_09_dev_100.htmlNational Oceanic and Atmospheric Administration, describes the centroid of the United States population. The article explains that the centroid of the United States population is calculated after every census in order to better understand the movement of the population (National Oceanic Atmospheric Administration2011). The article includes sections on how the centroid is calculated, why the information is useful, and where the centroid is currently located.Download the notebook file:

or download the .pdf if you don't have a SMART board: