8th Grade Math: Day 2

Mathematics

8th Grade

Start

Goals

Explore conjectures and counter-examples

Activity: Star Polygons

Its Game Time!!Pig and Odd Pig Out

Red Table Talk

Something

New

Try

Tell your table buddy something about you with a statement that has the word "Something" Ex. "Eating is something I like to do!"

Tell your table buddy something about you with a statement that has the word "New" Ex. "I got a new Xbox this weekend."

Tell your table buddy something about you with a statement that has the word "Try Ex. "I will try my hardest in class today."

Introduction

Counter Examples

It is an example of something that disproves a proposition or theory

Start

Learning situation // Context

Counter Examples

• Goal: Prove the teacher wrong.

Statement forms: “All ______s are _______” or “No ______s are _______.” “If it has ______, then it can _______.” Examples: 1. All birds can fly. (Counterexample: penguins) 2. If something produces light, then it is a light bulb. 3. If something has stripes, then it is a zebra.

Activity

Star Polygons

Start

Contents

Directions:

• The five-pointed star below was made by starting with five evenly spaced points and connecting every two points. We say we’ve used the “connection rule of 2.”

It’s called a star polygon when you hit all the points you started with in one continuous loop.

Pig and Odd Pig Out

Start

Learning situation // Challenge approach

Pig

Odd Pig Out

Goal: The first to 300 wins

• How to play:
• Each player takes turn rolling the dice as many times as they like
• After each roll, they multiply the numbers they rolled together.
• If the product is even, they add that number to their current points for the turn.
• If the product is odd, players lose all their points from that turn and their turn is over.
• A player may choose to end their turn at anytime and “bank” their points.
• Play to 300.

Goal: The first to 50 wins

• In teams of two, each person has one dice.
• Roll the dice and collect points.

• You can go as long as you want, but roll a one and you lose all your points from that turn!

• There will be a lot of winning and losing in this game - remember to be kind to your classmates even when you don’t get the outcome you want.

Closer

Red Table Talk

Did you make and/or break a conjecture? What did you learn from the process?

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