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5  Einsatz in der Schule
column is equal to the number of squares you have to add to form
the nth square from the n-1st one.
As we color in the successive unit squares we see a pattern on
the grid. Each bigger composite square increases in width and
height by 1. We count one more horizontal square, and a
corresponding increase in vertical squares. The 1st square has 1
square, the 2nd has 2 squares, the 3rd 3, and, so on.
Unlike squares, rectangles have different numbers of squares in
the vertical direction than the horizontal direction. Numbers that
yield squares also yield rectangles: 9, for instance, makes a 3x3
square and a 9x1 rectangle.
Students who are members of the 'Secret Square Society' know
and can give me upon my asking a 'square number'. They will be
able to visualize a rectangle by the number! They will know that
certain numbers can be made into more than one rectangle.
Children enjoy being in on the secret – and the game doesn't end
until everyone gets into the Secret Square Society.
I point out to teachers that the numbers that do not make a
rectangle or a square on the grid are prime numbers.
Coloring square grids can be very useful in: developing one's
powers to visualize number patterns, understanding factoring and
multiplication, developing concepts of perimeter and area,
identifying prime numbers, doing everyday arithmetic operations.
Square grids make math artful. Students can make designs with
squares that become letters of the alphabet, pictures, regular
repeat patterns, original designs for needlepoint, and much more.
Students who are more visual than verbal may find these
experiences especially meaningful. 
Mit freundlicher Genehmigung von Norman Shapiro
5.4.8  Geschichte: Spannende Archäologie
MayaQuest ist eine Archäologie-Expedition, die 1998 zum vierten Mal
stattfand und hoffentlich auch danach durchgeführt werden kann. Das
Forschungsteam wurde schon 1995 von über einer Million Personen via
Internet auf seiner Expedition begleitet. Im September 1998 ging eine
weitere Expedition nach Afrika.
Neben vielen weiteren Informationsangeboten im Zusammenhang mit
der Expedition werden pro Woche auch einige Fragen gestellt, die