August 14, 2018

## I Can’t Sleep Math: Caffeine Maths METRIC HERE.

Sensitivity to caffeine varies for individuals, but in healthy adults the half life for caffeine is approx 6hrs meaning your body eliminates half the caffeine you have drunk in 6 hrs.

Caffeine interferes with sleep. One study found that consuming caffeine 6 hours before bedtime reduced total sleep time by 1 hour.

Caffeine content sources Caffeine Content Data Base

Street art by JEKS, South Carolina

The Half life equation is an exponential function.

The Mayo Clinic advises up to 400mg Caffeine a day for adults, which would be;

10 black teas

7 instant coffees

4 cappuccinos

2 dark roast brewed

less than one cup of Black Insomnia Coffee.

Approx half this amount of caffeine for 14 yos.

August 14, 2018

## I Can’t Sleep: Caffeine Math USA UNITS HERE.

Sensitivity to caffeine varies for individuals, but in healthy adults the half life for caffeine is approx 6hrs meaning your body eliminates half the caffeine you have drunk in 6 hrs.

Caffeine interferes with sleep. One study found that consuming caffeine 6 hours before bedtime reduced total sleep time by 1 hour.

Caffeine content sources Caffeine Content Data Base

Street art by JEKS, South Carolina

The Half life equation is an exponential function.

The Mayo Clinic advises up to 400mg Caffeine a day for adults, which would be;

9 black teas

6 instant coffees

4 cappuccinos

2 dark roast brewed

less than one cup of Black Insomnia Coffee.

Approx half this amount of caffeine for 14 yos.

August 16, 2017

# The Solution:

## ………….METRIC UNITS

Remember the best calculator to use is the WEB 2.0 Calculator as it shows the worked equation as you go.

CAREERS: It’s not only health workers who need to understand these calculations, but also creatives running health campaigns online, on TV, radio and in magazines.

# TOPICS: Decimals, %, algebra, vol, weight units (METRIC)

PDF WORKSHEET HERE:How much blood can you lose and still survive? WORKSHEET METRIC

August 16, 2017

# The Solution:

## ………….USA Units

Remember the best calculator to use is the WEB 2.0 Calculator as it shows the worked equation as you go.

CAREERS: It’s not only health workers who need to understand these calculations, but also creatives running health campaigns online, on TV, radio and in magazines.

# TOPICS: Decimals, %, algebra, vol, weight units (USA UNITS)

PDF WORKSHEET HERE:How much blood can you lose and still survive? WORKSHEET USA UNITS

December 13, 2016

Mathematicians can make mountains out of mince pies, but in this case Dr Eugenia Cheng, who is Professor of Pure Mathematics at the University of Sheffield, UK, makes it look fun. The video clip includes some great Middle School Maths that you can eat.

## 4. The Harry Potter Algorithm

November 25, 2015

### Harry Potter and the Sorcerer’s Stone, J.K. Rowling

“Have you ever seen anything quite as pathetic?” said Malfoy. “And he’s supposed to be our teacher!”

Harry and Ron both made furious moves toward Malfoy, but Hermione got there first – SMACK!

She had slapped Malfoy across the face with all the strength she could muster. Malfoy staggered. Harry, Ron, Crabbe, and Goyle stood flabbergasted as Hermione raised her hand again.

“Don’t you dare call Hagrid pathetic you foul—you evil—”

“Hermione!” said Ron weakly and he tried to grab her hand as she swung it back.

“Get off Ron!”

Hermione pulled out her wand. Malfoy stepped backward. Crabbe and Goyle looked at him for instructions, thoroughly bewildered.

“C’mon,” Malfoy muttered, and in a moment, all three of them had disappeared into the passageway to the dungeons.

Hermione!” Ron said again, sounding both stunned and impressed.”

,

## Maths Mystery Box 7: PHONES

February 18, 2015

Middle school maths challenge

Algebra & texting

or  LGbra & txtN

According to a Nielsen Survey the Average US teen sends 3,000 txt messages a month. Averages don’t tell us very much. As this fab post at Maths PLUS explains. The average number of ears on 5 people is 1.8 if one dude has one ear. The Nielsen study did show the averages by gender.

This is the maximum cost per txt for pre-paid phone cards. Anyone who sends this many txt messages a month would be crazy if they didn’t use a monthly phone plan.

# HELP ME!

### Some txts are serious. Very serious.

The 24/7 in the USA has helped many teenagers in crisis.

# 741741

### the numbers down the Left of the phone.

OR from outside USA add code here. You can find details of the Crisis TEXT LINE in R U There? By Alice Gregory, The New Yorker (9 FEB 2015)

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