## Approaching Seven Billion people

To see the present world population, go here.  http://www.worldometers.info/world-population/

During the Fall 2011 the 7 billionth human on earth was born. The counter mentioned above gives updated approximations of the current world population.  When will we hit 8 billion people?  Students look at the number 7 billion, try to grasp its enormity with some comparisons, check out population, calculate some population density, work again with percents and have some fun thinking about our globe and where we live.

Below, for members, we have a teaching guide with solutions and suggestions for extentions.

## Occupy Wall Street protest is growing

The Occupy Wall Street (OWS) movement has grown since it began on September 17th.  Students can look at charts that show percent mentions of the demonstrations and calculate the percentage of media mentions, percentage of comment  growth, and the percentages of American wealth.  Again Twitter was the prime discussion vehicle.

For members we have solutions below.

## QR codes ???

Your students have probably seen these images around and might not know why they are becoming popular for smart phone scanning ... and possibly dangerous.  Students figure out the number of permutations of symbols that are possible with these 2-d scanning codes and compare that capability  to the capacity of ordinary UPC barcodes.   This activity might open student's eyes to some of the marketing that surrounds them and help them become aware of some possible dangers … all while engaging in mathematics.

CCSS: S-CP.9, HSA.CED.A, HSS.CP.B.9

QR_codes.pdf

For members we have the solutions for this activity below.

## Steve Jobs 1955 – 2011

"Steve leaves behind a company that only he could have built, and his spirit will forever be the foundation of Apple."... Apple CEO Tim Cook in a memo to Apple employees.

Students can honor Steve Jobs and be involved in an activity that allows them to talk about him and his accomplishments while devising a scaled time line of his life.

Tech Connection: You might also consider using TimeToast which is an interactive timeline maker.

CCSS: 5.MD1, MP1, MP3, MP5, MP6

Steve_Jobs,pdf

Sample solution for members:

## Bank of America Debit Card Fees

Millions of people and businesses use debit cards every day.  Banks didn't charge customers for their use. Banks actually gave rewards and incentives to customers for using them.

So how did banks make money from debit cards?  Banks charged the businesses that accepted those card payments. Merchant transaction fees averaged 44 cents per transaction, but, due to a new government regulation, fees are now capped at 24 cents.

It is estimated that the banking industry will lose billions.  Some banks are now starting to charge their customers a monthly fee for card use.  Bank of America just made the news by announcing a \$5 per month debit card fee. Customers are angry.

In this activity we take a look at the math behind this fiasco.  Will Bank of America come out ahead or lose money with the new debit card fee structure?

CCSS: 5.NBT.5, 7,EE.3, MP1, MP2, MP3, MP6

Debit-Cards2.pdf