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Planets' relative gravity spreadsheet: The students use online resources to find information about the eight planets in our solar system. Then, using the relative gravity of each planet, they will create a spreadsheet to calculate what the weight of an average man and woman (possibly their own weight or the weight of other objects) would be on each of the planets.; Format: lesson plan (grade 6 Science); By Susan Blevins.

Steelyard balance: Drawing of a steelyard balance, a balance with unequal arms used to weigh things. The item to be weighed is hung from the shorter arm, and a counterweight slides along the longer arm until the scale is balanced. The position of the counterweight on the longer...; Format: image/illustration

Solid graphing: The students will review solid figures using a baggie of assorted snack mix (cones, cubes, cylinders, and spheres) and will begin a vertical bar graph showing the number of each solid figure in a bag of assorted snack mix.; Format: lesson plan (grade 3 Mathematics); By Lisa Fletcher.

Statistics project: Students collect numeric and non-numeric data. They are then expected to use the data collected to construct different types of graphs as well as finding central tendencies.; Format: lesson plan (grade 5–8 Mathematics); By Audrea Saunders.

Float, sink, flink!: In this lesson, students will learn to make things flink, meaning they neither float to the top nor sink to the bottom of a fluid. They will discover that whether an object floats or sinks depends not only on the properties of the object itself, but also on the properties of the fluid (either gas or liquid) in which it is situated.; Format: lesson plan (grade 2 Science); By Erin Denniston.

Biomagnification and bald eagles: In this activity, students will study biomagnification by using paper cutouts to represent food containing chemicals eaten by fish. The students will then repeat this activity but as an eagle collecting fish. The amount of chemicals taken in by each eagle will then be compared to amounts taken in by each fish.; Format: lesson plan (grade 6 Science); By Elizabeth Caveny, Janet Carson, Heather Subleski, and Jeannie Galluzzo.

1890 Scott's Emulsion: This is an advertisement for Scott's Emulsion, a weight gain product sold in the late 1800s. It claims that it will cure "all forms of wasting diseases" including consumption, bronchitis, scrofula, coughs and colds. The advertisement was found in the January...; Format: image/photograph

Stone courtyard crumbling under weight of trees in Preah Khan Temple at Angkor: A stone courtyard in Preah Khan Temple at Angkor is crumbling under the weight of trees and other erosion factors. Preah Khan means "Sacred Sword" in Khmer, and the temple was built at the site of Jayavarman VII's victory over Cham invaders in 1181 A.D. The...; Format: image/photograph

Data gathering - Linear regressions: In groups of three, students gather data by experiment or observation in one of nine activities. Each group models the data they gathered, creates a display, and presents results to the class using an overhead projector.; Format: lesson plan (grade 9–12 Mathematics); By Judy Pickering.

What's the matter?: Students will categorize matter according to its properties.; Format: lesson plan (grade 1 Science); By Lisa Lawrence.

Partners in measurement: Students will apply their knowledge and demonstrate their ability to use standard and non-standard customary units in a cooperative measurement activity.; Format: lesson plan (grade 4 Mathematics); By Vanessa Thomas.

Balinese girl in purple and gold costume raises arms in welcome dance: A Balinese girl in a purple and gold silk costume raises her arms in a welcome dance. Wearing a headdress of gold and fresh flowers, the dancer looks towards her outstretched right hand that is bent back at the wrist. Her left arm is bent at the elbow with...; Format: image/photograph

Enduring amputation: In North Carolina in the Civil War and Reconstruction, page 5.10; Letter from a Civil War soldier to his brother about how he is getting along with his artificial leg. Includes historical commentary.; Format: letter

What causes sea level change, and why is it rising now?: In Evidence of rising sea level: Coastal erosion and plant community changes, page 2; North Carolina's coastal zone preserves evidence of both the current rise in sea level and the long decline that preceded it (see the Coastal Wetlands field trip included in this series). Evidence of declining sea level is found in the series of old shorelines...; By Dirk Frankenberg.

Balinese woman buys pieces of raw chicken at an outdoor market: A Balinese woman in a blue blouse and yellow skirt buys pieces of raw chicken from another woman at an outdoor market. The vendor, wearing a red jacket and a printed cloth around her hair, weighs the chicken pieces with a kilogram balance scale. A set of cylindrical...; Format: image/photograph

Why does North Carolina have so many, and so many kinds of, monadnocks?: In Lonely mountains: The monadnocks of the inner Piedmont, page 2; North Carolina has more than a dozen monadnocks scattered among its Blue Ridge mountains, and another ten or more on its Piedmont Plateau. These monadnocks formed during dramatic and diverse events that occurred as the state's crust formed. Most of these geologic...; By Dirk Frankenberg.

Venetian Gondola and Gondolier: Transportation through one of Venice's 150 canals includes the option of a romantic excursion by gondola as seen here. Gondolas are long, asymmetrical, narrow boats made of one of only eight types of wood. The left side of the gondola is made longer to counterbalance...; Format: image/photograph

Does my vote count? Understanding the electoral college: In Election 2008, page 4.1; This tutorial for students explains how the electoral college works, the origins and development of the electoral college as some controversial elections, and how much any one vote actually "weighs" in an election. Readings and activities are included.; Format: tutorial; By David Walbert.

Two women carry trays suspended from shoulder poles in street at Hoi An: Two women carry trays suspended from shoulder poles in a street at Hoi An. Both woman wear conical sunhats and loose, pajama-style work clothes. This method of transporting food or other goods while walking depends on the equal balancing of front and back...; Format: image/photograph

KidSenses Children's InterACTIVE Museum: The interactive exhibits at this children’s museum spark the imagination and kids have fun as they play and learn.; Format: article/field trip opportunity

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