# data[].attributes.headline
Read through these notes to help answer your questions.

# data[].attributes.subject
Read through these notes to help answer your questions.

# data[].attributes.attachment_link.title
Google Slides - create and edit presentations online, for free.

# data[].attributes.attachment_link.description
Create a new presentation and edit with others at the same time. Get stuff done with or without an internet connection. Use Slides to edit PowerPoint files. Free from Google.

# data[].attributes.headline
Play this kahoot when all have finished the 4 questions.

# data[].attributes.subject
Play this kahoot when all have finished the 4 questions.

# data[].attributes.headline
When you complete all 4 questions.  Click here for a desmos activity using class code 3KWBF.  

# data[].attributes.subject
When you complete all 4 questions.  Click here for a desmos activity using class code 3KWBF.  

# data[].attributes.attachment_link.readable_text
Ask questions to guess which shape your classmate picked.

We have designed Polygraph to foster the pleasure and the power of words without the drudgery of the lists.

With Polygraph, Desmos provides tools for developing informal language into formal vocabulary. Because words should result from a need to describe our world-this is where they gain their power.

And we also know well the pleasure of having just the right word handy at just the right moment-what the French call le mot juste.

1.

2.

3.

Before you put students on computers, make sure they understand the premise of the game. We do not recommend playing a sample round with the class, as the first round involves the computer asking questions of all of the students (a fact we do not reveal until they have finished the first round). You could easily, however, play a low-tech version-show the array, pick your quadrilateral, have students ask questions aloud, respond, et cetera.

Starting in the second round, we pair students with each other. One student picks the quadrilateral and answers questions, the other student asks the questions and tries to identify the chosen shape. Between rounds, students answer questions that focus their attention on vocabulary and strategy.

Pro Tip!The easiest way to test out Polygraph is to find a friend to play with you. Create a class code, give your friend the class code, and each of you can enter that at student.desmos.com. Your friend may be in the same room, down the hall, or halfway around the world-so long as the two of you are playing at the same time.

If you want to play on your own, you'll need two browser tabs, and you'll need to play the roles of two different students. After you create a class code as a teacher, go to student.desmos.com in each tab and enter the class code. Be sure to sign out on each tab so you don't appear to be the same person in both tabs. Then just toggle between the two tabs to play both sides of the game.

Observe and talk with students as they play their rounds. Use those conversations, and what you glean from the teacher dashboard to keep track of which features students notice and discuss.

Keep an eye out for students who are waiting too long for a partner.

To what extent are students using formal vocabulary? What ways do they create to describe standard (and non-standard) features of the polygons?

Keep an eye out for students who pick the wrong suspect. Thinking about what went wrong, is a challenging bit of reflection. Some students may need encouragement and support to see it through.

You can click on a pair's game in the teacher dash to view the entire game.

There are a couple of ways you can wrap up this lesson. You could end it by playing a round against the class. Invite discussion of the ideas and strategies behind the questions your students ask. (And then play a second round - if you can guess the class's suspect in fewer questions than they guessed yours, you are the reigning Polygraph champion!)

As an alternative, you could use the teacher dashboard to identify some interesting questions that students asked as they played, and bring these questions to their attention. These might include use of vocabulary you want to introduce or examples of students noticing things about the suspects that most did not.

# data[].attributes.attachment_link.description
Ask questions to guess which shape your classmate picked. We have designed Polygraph to foster the pleasure and the power of words without the drudgery of the lists. With Polygraph, Desmos provides tools for developing informal language into formal vocabulary. Because words should result from a need to describe our world-this is where they gain their power.

# data[].attributes.headline
4.  Create a flowchart that shows the relationship between quadrilaterals and parallelograms. You may use the features  on padlet or draw your own and take  a picture and upload it.

# data[].attributes.subject
4.  Create a flowchart that shows the relationship between quadrilaterals and parallelograms. You may use the features  on padlet or draw your own and take  a picture and upload it.

# data[].attributes.headline
3.  While a trapezoid is a quadrilateral, it is not a parallelogram. Explain why not.

# data[].attributes.subject
3.  While a trapezoid is a quadrilateral, it is not a parallelogram. Explain why not.

# data[].attributes.headline
2.  What are the 5 main properties of all parallelograms.

# data[].attributes.subject
2.  What are the 5 main properties of all parallelograms.

# data[].attributes.headline
1.  What are 2 properties that all quadrilaterals share?

# data[].attributes.subject
1.  What are 2 properties that all quadrilaterals share?

# data[].attributes.headline
Watch this video first and then answer the following questions.

# data[].attributes.subject
Watch this video first and then answer the following questions.

# data[].attributes.attachment_link.title
4 sided Polygons-Quadrilaterals and their properties