Learn how to resize shapes proportionally to each other with fractions and variable expressions.

The Riddle Interactive outlines the characteristics of riddle poems and provides direct instruction on the prewriting and drafting process for writing original riddle poems.

In this paper and pencil exercise, students create graphs that describe the effect of a series of experiments using Daisy World, an energy balance model, that can be used to demonstrate concepts of equilibrium, homeostatis, and positive and negative feedbacks. Internet access and exploration with the actual Daisy World model is ideal, but not required. The resource is Activity 6 of the learning module, Global Balance, part of the lesson series Potential Impacts of Climate Variability and Change.

This short video and interactive assessment activity is designed to give fourth graders an overview of rotational symmetry.

This short video and interactive assessment activity is designed to teach third graders an overview of rotational symmetry.

This short video and interactive assessment activity is designed to give fifth graders an overview of rotational symmetry.

This short video and interactive assessment activity is designed to teach second graders an overview of rounding decimal numbers.

This short video and interactive assessment activity is designed to give fourth graders an overview of rounding decimal numbers.

This short video and interactive assessment activity is designed to give fifth graders an overview of rounding decimal numbers.

This short video and interactive assessment activity is designed to teach second graders about rounding to the nearest 2 decimal places, or the hundredths place.

This exercise is a second or familiarization exercise in spreadsheeting, but is also a mathematical model for slope evolution. It uses the concept of "erosivity" (generally, the relative ratio of driving and resisting forces) and slope angle to reshape an initial topography. Finally, it asks the students themselves to come up with a real-world situation worth modeling.

(Note: this resource was added to OER Commons as part of a batch upload of over 2,200 records. If you notice an issue with the quality of the metadata, please let us know by using the 'report' button and we will flag it for consideration.)

Observe what happens to an image when the scale changes. This interactive exercise focuses on visually comparing multiplicative and additive relationships.

Use a virtual scanning tunneling microscope (STM) to observe electron behavior in an atomic-scale world. Walk through the principles of this technology step-by-step. First learn how the STM works. Then try it yourself! Use a virtual STM to manipulate individual atoms by scanning for, picking up, and moving electrons. Finally, explore the advantages and disadvantages of the two modes of an STM: the constant-height mode and the constant-current mode.

In ScholCom 202X, you'll take on the role of a new scholarly communication librarian at a small public university somewhere in the US in the "distant future" of the year 202X.

You'll be given a number of scenarios derived from activities and questions a real scholarly communication librarian might expect to receive. These scenarios fall into four general areas: copyright; publishing; institutional repositories; and open access.

The game has two versions, an interactive fiction format written in Ink (located in the "Ink source" and "playable" folders) and a static PDF version (in "printables").

In the interactive fiction version, after reading each scenario you'll be given a chance to consult your "augment," a smartphone-like device which contains a very brief annotated list of some relevant sources and a calendar that tracks how busy you are. In the PDF/print version, these sources are listed below the scenario text, and are open access whenever possible.

After you've read the scenario text and consulted these sources (or not), put yourself in the place of the librarian in the game and think about how you would respond. Would you try to help just the person you're currently talking to, or would you rather build resources and develop strategies that could make the question easier to answer the next time it comes up, and potentially even reach and educate people who don't know the questions to ask in the first place?

As you think through each scenario, ask yourself how you would balance the desire to do a good job against the threat of overwork. You're welcome to write out what you would do, or just think about it. The PDF versions of the scenarios can also be used to role play in a classroom setting, with one student taking on the role of the librarian and another the role of the person who needs their help.

Playable version at https://people.wou.edu/~bakersc/ScholCom202X/index.html. Additional background available at https://lisoer.wordpress.ncsu.edu/2021/05/18/new-to-the-scn-scholcom-202x-an-interactive-fiction-game/.

Genetic Engineering interactive learning website that includes:
Journey of a Gene - Learn the steps of genetic engineering to help us make soybeans that are resistant to Soybean Sudden Death Syndrome.
Enviropig - Learn the steps of genetic engineering to help us make environmentally friendly pigs.
Genetic Engineering: Oomycete - Learn the steps of genetic engineering used in the process of developing oomycete resistant soybean.
Farmers, Consumers, and GMOs - The world in which we live is constantly changing. Farmers and consumers need to adapt in order to deal with those changes. The use of genetically modified organisms (GMOs) is one way to help them with adapting. The purpose of this learning environment is to provide the knowledge necessary to assist farmers and consumers to navigate through our changing world.

Screening Shakespeare is an open-access web-based textbook written and designed by Alexa Alice
Joubin based on her original research. It contains openly-licensed learning modules that introduce
students to key concepts of film studies, such as mise-en-scène, cinematography, sound and music,
and film theory within the context of film adaptations of Shakespeare’s plays.

Secretos de los Hibernadores. El Centro de Extensión y Educación en Ciencias Naturales colabora con la facultad de CSU, los Parques Nacionales y los programas de ciencia ciudadana para traducir su investigación científica actual en experiencias STEM únicas para los estudiantes en forma de kits educativos que se pueden prestar. Cada kit contiene casi todos los materiales necesarios (menos cosas comunes como agua y toallas de papel) para explorar algunos temas de investigación científica realmente interesantes. enviando un formulario de recogida local o un formulario de entrega disponible en el sitio web vinculado. Utilice la información de contacto en la página de descripción general del kit STEM para obtener más información. https://www.cns-eoc.colostate.edu/stem-kits/ Este kit se proporciona de forma gratuita para uso educativo.

Secrets of the Hibernators STEM Kit. The Natural Sciences Education & Outreach Center collaborates with CSU faculty, National Parks and citizen science programs to translate their current scientific research into unique STEM experiences for students in the form of Educational Kits that can be checked out. Each kit contains just about all of the materials needed (minus common things like water and paper towels) to explore some really interesting scientific research topics.The kits are available for teachers and informal educators in Colorado to check out for a duration of a week by submitting either a local pickup form or a delivery form available at the linked website. This kit is provided free for educational use. This Kit is available in Spanish.

Volcanic eruptions can produce large amounts of debris in the form of sediment. Volcanic sediment is a serious hazard that can flood river valleys, bury homes and wash out bridges and roads. In the 1980 eruption of Mount St. Helens, many billions of cubic meters of sediment flowed down from the mountain through the surrounding river valleys, which caused major flooding and damage to the homes of people living downstream.

In the “Sediment on the Move” storyline, fourth-grade students explore the hazards of volcanic sediment and solve the problem of managing these hazards. This robustly developed and problem-based learning unit supports teachers in creating a rigorous and rich experience for students through use of fully-developed teacher support resources (Google Slides for students ready to be used), rich media (videos, images, first-person narratives), and a plethora of engaging and 3-dimensional formative assessments.

Through various activities, scientific inquiry and exploration, students become acquainted with the size and scale of volcanic sediment as a long-term hazard for communities that live downstream of volcanoes. In this unit students design their own community and roleplay as city council members. Students collaborate with characters who model real-world career professionals (such as engineers, geologists and emergency managers) who help them design their own solutions to the problem of volcanic sediment. Through science, teamwork, and communication, students generate and compare multiple solutions to help their community be prepared for the hazards and challenges from volcanic sediment. At the end of the storyline, students create recommendations and design plans to share with other communities facing similar challenges.