# Featured

## Tallest Buildings in the World (February 14-17)

We continued our exploration of relative size and scale by looking at the tallest buildings in the world. The children studied my models of the former Twin Towers which have a scale of 1:373. The actual buildings were once a quarter of a mile high.

Before, the Twin Towers, the Empire State Building was the tallest for 40 years from 1930. Last year, the Burj Khalifa was completed in Dubai at 2,716 feet, more than a half a mile high.

## Relative Size of Planets (February 7-10)

As a child, looking at Solar System picture books was a fascination, but I never realized how grossly inaccurate those pictures were in terms of relative size and distance of planets.

## Fraction Shading (January 31 through February 4)

What is a fraction? A fraction is a way of representing division of a whole into parts. It has the form of numerator over denominator N/D, where the numerator is the number of parts chosen and the denominator is the total number of equal parts.

## Pick's Theorem to find Area of Polygon on Grid (January 24-27)

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The children did a great job last week of determining area and perimeter in terms of square units and linear units, respectively. They did this using our City A through City D plus their own creations.

## Area and Perimeter -- Rectangular City Planning (January 18-20)

We explored how the children identified a rectangle on a geoboard. The children learned the most general attibute is a "polygon," "quadrilateral," a "parallelogram," then a "rectangle." 'How do you name this rectangle?' was the next question. We learned that you name rectangles by their dimensions. Two dimensions, "length and width," "base and height." For example, a 3x5 rectangle.