MidSchoolMath 1

Identifying situations in life that illustrate the "zero pair" concept will help students build a strong foundation leading up to adding and subtracting integers. During Ghost Tamers!, Tina and Liz receive a call from Mrs. Crink who needs their help taming some ghosts at her inn. Tina and Liz arrive at Blackwater Inn and explain to Mrs. Crink that the glowing ghosts she’s experiencing are electrically charged plasma fields. As Ghost Tamers, they use their devices to neutralize the charge of the fields (bringing them to a zero charge), which calms the energy. Tina and Liz set about the Inn, finding the "ghosts" so they can neutralize them with their devices. The data provided are the device readings, showing the charge emitted by each ghostly energy.

LESSON: GHOST TAMERS!At what charges should the Ghost Tamers set their devices?

Ghost Tamers!

Describe situations in which opposite quantities combine to make 0. For example, a hydrogen atom has 0 charge because its two constituents are oppositely charged.

The Math SimulatorTM

ImmersionPlay Ghost Tamers! Immersion video, whole-class. Restate the question: At what charges should the Ghost Tamers set their devices?Facilitate classroom discussion; ask students: "What do we need to know?"

•

•

•

1

2 Data & ComputationPrint the Data Artifact and distribute to students. Allow students work time. Ask students: "Does your answer make sense?"Consider using a sharing protocol leading to mathematical insights and/or highlighting misconceptions. Allow students to revise their work.

•

•

•

•

3 ResolutionPlay Ghost Tamers! Resolution video, whole-class. Prepare and give brief lecture (Teacher Instruction).

••

Download the Detailed Lesson PlanAvailable on the Teacher Dashboard

+ Simulation TrainerAssign the Simulation Trainer.Use protocols that encourage students to help each other.Use Progress Monitoring to access real-time data for the classroom.Provide individual help for students who are not making progress.

•

•

••

(Use student headphones.)

7.NS.A.1aThe Number System

MidSchoolMath Ghost Tamers!

Clicker QuizLaunch the Clicker Quiz, whole-class.

7.NS.A.1aThe Number System

2

Gladys: Students will build upon their knowledge of positive and negative rational numbers, previously learned in 6.NS.C.5 and 6.NS.C.6a.

Kevin: Ask students to brainstorm situations in which opposite quantities combine to make 0 (elevator going up or down a number of floors; filling a cup halfway with the faucet all the way on hot and then halfway with the faucet all the way on cold; etc.).

Megan: When possible; connect these situations with the equation p + (-p) = 0. An elevator going up 5 floors then down 5 floors can be represented by 5 + (-5) = 0.

KevinSimpson

GladysGraham

MeganLeBleu

Ex. Clicker Quiz #6Standard Math Procedures

Instruction at a Glance

1 Determine values of each point on the number line.A: -8

C: -3D: 2E: 8

B: -6

D: A and E2 Identify the two opposite quantities.

7.N

S St

anda

rds

& L

esso

ns7.

NS

Ass

essm

ents

7.N

S D

omai

n Re

view

GHOST TAMERS!At what charges should the Ghost Tamers set their devices?Tina and Liz received a call from Frohan’s Funeral Home, asking for help with a ghost problem. Excited to have another job, they hurry over to Frohan’s.

Mr. Frohan greets them and shows them to the basement where the ghost activity is occurring. Tina and Liz explain to Mr. Frohan that they “tame ghosts” by neutralizing (or zeroing out) the charge that is being given off by the “ghost.”

As Mr. Frohan leaves them to their work, Tina and Liz immediately begin to pick up charged energies on their devices. Knowing they must zap each energy with an opposite charge, they get to work.

Help Tina and Liz set their devices to the correct charge.

7.NS.A.1a

Describe situations in which opposite quantities combine to make 0. For example, a hydrogen atom has 0 charge because its two constituents are oppositely charged.

About this standard

Date PeriodName

MidSchoolMath Ghost Tamers! 1 of 2

TamingCharge

#1:________

TamingCharge

#2:________

TamingCharge

#3:________

TamingCharge

#4:________

TamingCharge

#5:________

APPLYING THE STANDARD

Place an ‘X’ inside the box next to each situation where the answer to the question would be 0.1)

MidSchoolMath Ghost Tamers! 2 of 2

Date PeriodName

How might this standard appear on a test?

Using what you know about opposites and zero pairs, determine whether each sum would be positive, negative, or zero.

3)

196 + (-201)a)

86 + (-54)d)

-333 + 415b)

-248 + 122e)

510 + (-510)c)

-499 + 499f)

The goal of this card game is to make a sum of 0 with three cards. For each hand of cards, fi ll in values for the two other cards that would make 0.

2)

Itxchel jumped into a pool from a diving board 10 feet above the water. She sank 10 feet then swam straight up to the surface of the water. How many feet did Itxchel swim?

Roger left his house and walked 4.5 miles directly north. He then walked 4.5 miles directly south. At this point, how many miles was Roger from his house?

The low temperature one day was -4° Celsius. The high temperature that day was 4° Celsius. What was the diff erence between the low and high temperature?

On the fi rst play of the game, the Pigeons football team ran for 16 yards. On the second play of the game, the quarterback got sacked for a loss of 16 yards. How many yards did the Pigeons get on the fi rst two plays?

Lost Sun Hiking Trail begins at an elevation of -22 feet. The trail ends at an elevation of 22 feet. By how many feet does the elevation of the trail change from beginning to end?

A sodium atom has 11 protons with a positive charge and 11 electrons with a negative charge. What is the overall charge of the atom?

Check out my worked example #3a

7.N

S St

anda

rds

& L

esso

ns7.

NS

Ass

essm

ents

7.N

S D

omai

n Re

view