Heather Sullivan's Public Library

The purpose of Teaching with Contests is to assist educators in finding
contests that can be used in the classroom to motivate students. We are here for
the student and the teacher not the promotion of products or company public
relations. Our goal is to select contests and programs whose primary goal is
education and secondarily business/product promotion.

Simply enter two different phrases or words and challenge your
friends to guess which has been said most on twitter in the last 24 hours.

It's that easy, oh and FUN!

Dorie Glynn, who teaches a bilingual 2nd grade class at Kirk Elementary
School in Houston, has been preparing students for conversations of their own on
Twitter. The students have started following other classes at the school, and
across the country, as they get ready to share data on regional cultures,
weather, and to play a virtual I Spy game, in which they will hunt for geometric
shapes in maps and photos sent from Twitter followers in other places.

“I see a huge amount of potential for connecting with another classroom,
asking regional questions, comparing and contrasting areas,” Ms. Glynn said.

Google.org aspires to use the power of information and technology to address
the global challenges of our age.

Resizr is a free online image resize and crop tool with lots of extras!



Features:


• Resize Pictures with High quality
• Crop to get just what you want
• Rotate 90, 180, 270 degrees
• Specify the exact size you want
• Resize unlimited pictures
• On the web
• With MySpace CODES!!
• Via E-Mail
• Send to your mobile phone (FREE!)
• Make your own cellphone background

Photo-editing, logos, web templates, filters, color palettes,
screen capture & more at
Aviary.com

Woopra is the world’s most comprehensive, information rich,
easy to use, real-time Web tracking and
analysis application. We deliver the richest library of visitor
statistics in the industry through our innovative desktop application. But
Woopra is more than simply statistics.

Our service was built as a framework for expansion complete with an open API
and plugin capabilities. We continue to add features and functionality which
immediately become available to all customers. We invite you to sign up and experience the
power of Woopra first hand!

Visual
Dictionary, to learn by way of image with thematic, clear and precise pages,
with concise and rigorous texts, multilingual, the InfoVisual will become an
academic resource. Different from an encyclopedia or from a traditional online
dictionaries, thesauri and glossaries because the images replace the
words.

A teaching website of reference which will be able to find an
essential place as a good link on your site.
For general questions or if this
is your first visit, consult the help section

If you would
like to use infovisual.info image on your website, It is permitted as long as
you observe the "share image" procedure available on each
page of the site. We tried to make this procedure as easy as possible.

Find out what's trending on Twitter and why. For each trend, we
give you a quick explanation of WHY it's trending (these blurbs are edited by
you!) You can also see the latest tweets, Flickr photos and news stories.

Estimating
Population Size

Objective:  You will be
expected to estimate the size of a sample population using the mark-recapture
technique.  Be able to apply the technique to new population problems and
compare the mark and recapture technique to other methods of population
estimating.

1.  If you were in
charge of a team given the responsibility to determine the number of sunfish in
Horseshoe Lake, discuss with your partner how would you accomplish this task and
describe in detail below.

Technique 1: 
Sampling

A technique called sampling
is sometimes used to estimate population size. In this procedure, the organisms
in a few small areas are counted and projected to the entire area.  For
instance, if a biologist counts 10 squirrels living in a 200 square foot area,
she could predict that there are 100 squirrels living in a 2000 square foot
area. 

2.  A biologist
collected 1 gallon of pond water and counted 50 paramecium.  Based on the
sampling technique, how many paramecium could be found in the pond if the pond
were 20,000 gallons. 

3.  What are some
problems with this technique?  What could affect its accuracy?

Technique 2 - Mark and Recapture

In this procedure,
biologists use traps to capture the animals alive and mark them in some
way.  The animals are returned unharmed to their environment.  Over a
long time period, the animals from the population are continued to be trapped
and data is taken on how many are captured with tags.  A mathematical
formula is then used to estimate population size.

Procedure:

You will receive a bag that
represents your population (beans, pennies, chips, beads)

Capture 10 “animals” by removing
them randomly from the bag.

Place a mark on them using tape or
string

Return the 10 marked “animals” to
the container

With your eyes
closed, select 15 “animals” from the contain one at a time.  This is the
recapture step.   Record the number of “animals” recaptured
that have a mark on the data table.

  Return the “animals” to the bag and
repeat. Do 10 recaptures.

   When the ten recaptures are are
completed, enter the total number captured on the data table

Also enter the total number of
recaptured that have a mark

Data Table

Calculations

In order to estimate your
population size, follow this formula

Estimate of Total
Population  =  (total number captured) x (number
marked)

                                                  
(total number recaptured with mark)

4.  What is the
estimation of your population?  (Show your calculations
below)

                                                                  
Estimated  Size ___________

5.  Use the code-name
on your bag to check with the teacher about how many “animals” are really in
your population. 

                            
Name on Bag ___________________________  Actual Size _____

Analysis

6.  Compare the actual
size to the estimated size.  Did you overestimate or
underestimate?

8.  Given the following
data, what would be the estimated size of a butterfly population in Wilson Park.

A biologist originally
marked 40 butterflies in Wilson park.  Over a month long period ­
butterfly traps caught 200 butterflies.  Of those 200, 80 were found to
have tags.  Based on this information, what is the estimated population
size of the butterflies in Wilson park?

9.  In what situations
would sampling work best for estimating population size, in what situations
would mark & recapture work best.  You’ll probably have to think about
this one.  Justify your answer.