Resources to mark the 100th day of school with math activities. Challenge students to generate 100 different ways to represent the number 100. Students will easily generate 99 + 1 and 50 + 50, but encourage them to think out of the box. Challenge them to include examples from all of the NCTM Standards strands: number sense, numerical operations, geometry, measurement, algebra, patterns, data analysis, probability, discrete math, Create a class list to record the best entries. Some teachers write 100 in big bubble numeral style and then record the entries inside the numerals.

This curriculum covers all of the material outlined by the College Board as necessary to prepare students to pass the AP Biology exam. This course is designed to acquaint you with the general concepts of life including reproduction, balance in nature, and the nature of living things. You will focus on three broad sections that align with the goals for the AP exam: Molecules and Cells, Heredity and Evolution, and Organisms and Populations.

The information presented in each ActionBioscience.org article has been correlated to the U.S. National Science Education Standards (NSES). Articles may be listed below in more than one category of the standards and educators may determine other curricular applications for the articles.

Finches on the Galapagos Islands have evolved to exploit almost every possible niche. This diagram shows the range of food sources available on the island and the different beak shapes adapted to exploit each of them.

Why did sex evolve? The likely answers, in this essay for the Evolution Web site by science journalist Matt Ridley, may surprise you.

Recommended for: Grades 9-12

Evolution has resulted in changes in the sizes and forms of organisms. Everything about the biology of an animal, including its physiology, anatomy, and ecology, is influenced by its body size. Frequently there seem to be limits on the sizes that different organisms can attain, even when larger size might be thought to be evolutionarily advantageous. Often an increase or decrease in size is correlated with a change in proportions. Understanding the significance of a particular morphology or interpreting the factors that underlie a particular evolutionary trend involve studying the relationships that exist among size, shape, and function. This lab introduces allometry, the study of size and its consequences, using celery and woodlice as subjects.

This is a laboratory exercise appropriate for sophomore level students. No prior math is required, and lab exercise can be adapted if computer facilities are available.

These images from the Smithsonian Institution depict Nancy Knowlton's work with snapping shrimp in Panama. Knowlton found that the closing of the isthmus -- dividing the Pacific Ocean from the Caribbean -- resulted in new species of shrimp.

By manipulating a simple kinematic model representing the leg and foot, students can get hands on information about the interaction of bones and muscles in humans. Having worked with the model, they then are able to predict and analyze the properties of bone/muscle systems in other vertebrates and understand how these systems have become modified during the course of evolution for a particular life style. By the end of the exercise, students have learned both traditional information (cellular structure, names of bones, taxonomy of vertebrates) and how to project the knowledge they gained from working with a model to the biological world.

This video segment from Evolution: "Evolutionary Arms Race" tells the story of the leafcutter ant and the fungus it farms -- an example of mutually beneficial symbiosis.

This course will sample the broad diversity of animal behavior and the behavioral adaptation of animals to the environments in which they live. This will include discussion of both field observations and controlled laboratory experiments. Particular emphasis will be placed on the comparison of behavior within an evolutionary framework, animal cognition, and on the genetic, neural, and hormonal mechanisms underlying behavior.

The homeobox genes that define the basic body plan of mice and fruit flies are illustrated in this graphic from The Human Evolution Coloring Book by Adrienne Zihlman. The accompanying article describes how these genes act as molecular architects in all animal species.

This month, pink products — from sneakers to vacuum cleaners — will pop up on store shelves. Even Campbell's Soup will shed its tomato red label in favor of pearly pink. Whatever your opinion on the pink campaign to raise awareness of and research dollars for breast cancer, the cause is unlikely to escape your notice during October, National Breast Cancer Awareness Month. Since nearly 200,000 women in the United States will be diagnosed with breast cancer this year alone, funding for research has the potential to improve the quality of life and survival odds for many millions of people. But despite increased attention and funding, the cure for this and other cancers has remained notoriously elusive. Viewing cancer through the lens of evolution helps explain why a cure seems to remain just out of reach and points the way toward new treatments.

" If the twentieth century was the century of physics, the twenty-first promises to be the century of biology. This subject examines the cultural, political, and economic dimensions of biology in the age of genomics, biotechnological enterprise, biodiversity conservation, pharmaceutical bioprospecting, and synthetic biology. Although we examine such social concerns as bioterrorism, genetic modification, and cloning, this is not a class in bioethics, but rather an anthropological inquiry into how the substances and explanations of biology — increasingly cellular, molecular, genetic, and informatic — are changing, and with them broader ideas about the relationship between "nature" and "culture." Looking at such cultural artifacts as cell lines, biodiversity databases, and artificial life models, and using primary sources in biology, social studies of the life sciences, and literary and cinematic materials, we rephrase Erwin Schrödinger's famous 1944 question, "What Is Life?" to ask, in the early 2000s, "What Is Life Becoming?""

Unlike most population genetics labs, which involve simulations with beans or beads, this lab provides an opportunity to study a population of living organisms. Using Bar and wild-type Drosophila, students compare allele and genotype frequencies to Hardy-Weinberg expectations. Because the Bar mutation in Drosophila is sex-linked and incompletely dominant, students can determine the exact genotype of a fly from its phenotype. These data are evaluated to determine which (if any) of the five Hardy-Weinberg assumptions have been violated. This real-data approach allows students to appreciate the value of this null model and helps the instructor to discover and correct students' misunderstandings of the model.

In this video segment adapted from KUAC, find out why the horizon in Alaska is sometimes shrouded in pollution and what it means for climate change in the Arctic.

This resource includes a detailed description and instructional information for carrying out an undergraduate laboratory exercise in ecology, behavioral biology, and evolution. It includes student outlines, instructors notes, and suggested questions for laboratory reports.

Avida-ED allows users to design and perform experiments to test hypotheses about evolutionary mechanisms using evolving digital organisms. Avida-ED is an NSF-funded project to develop a digital evolution educational software platform for use in biology courses. The co-PIs on the project are Charles Ofria, Richard Lenski, and Diane Ebert-May. There are several on-line tools to help with problems with the Avida-ED program

This site provides access to more than 4,000 reviewed resources covering 76 biological science topics: agriculture, anatomy, bacteriology, biochemistry, biodiversity, biotechnology, botany, cardiology, cell biology, ecology, environment, evolution, genetics, geography, human biology, immunology, marine biology, microbiology, molecular biology, neurobiology, pathology, pharmacology, physiology, public health, respiratory biology, soil biology, virology, zoology, and others. Registration required.