Explore stretching just a single strand of DNA using optical tweezers or fluid flow. Experiment with the forces involved and measure the relationship between the stretched DNA length and the force required to keep it stretched. Is DNA more like a rope or like a spring?

What happens when sugar and salt are added to water? Pour in sugar, shake in salt, and evaporate water to see the effects on concentration and conductivity. Zoom in to see how different sugar and salt compounds dissolve. Zoom in again to explore the role of water.

Explore what it means for a mathematical statement to be balanced or unbalanced by interacting with integers and variables on a balance. Find multiple ways to balance x and y to build a system of equations.

The Teach the Earth Portal has hundreds of high school through higher ed geoscience educator shared content ranging from low stakes to high stakes undergraduate core level to graduate level resources. More recently, have also added virtual field experiences appropriate for core course to upper division field camp (in response to pandemic necessity for Summer 2020 Field Camp revisioning). Many of the contributions are from members or partners with the National Association for Geoscience Teachers. There is an ongoing review process by professional peers to vet content submitted / aggregated into this portal during the past several decades.

In order to promote students’ conceptual understanding and learning experience in introductory statistics, a technology task, which focuses on the probability distribution in which means are defined, was created using TinkerPlots, an exploratory data analysis and modeling software. The targeted audiences range from senior high school grade levels to college freshmen who are starting their introductory course in statistics. Students will be guided to explore and discover the movement behaviors of means of a set of numbers randomly generated from a fixed range of values characterized by a predetermined probability distribution. The cognitive, mathematical, technological and pedagogical natures of the task, as well as its association with the statistics education framework based on the Guidelines for Assessment and Instruction in Statistics Education (GAISE) by the American Statistical Association, will be elaborated. A brief discussion on what cognitive design principles this task satisfies will also be provided at the end.

The Texas Core to Open site is intended to facilitate discovery and use of open resources for core courses across the state of Texas at institutions of higher education. The Texas Core to Open site will continue to develop and change depending on the needs of the community, and are outlined in the future developments section. This resource is intended to ease the burden of finding materials to consider for a common core course, but the instructor of record is the subject matter expert, and final decision maker when it comes to what material is appropriate for their students.

Investigate how torque causes an object to rotate. Discover the relationships between angular acceleration, moment of inertia, angular momentum and torque.

Investigate how torque causes an object to rotate. Discover the relationships between angular acceleration, moment of inertia, angular momentum and torque.

This activity aims to stimulate discussion on the question of whether computers can exhibit Ňintelligence" or are ever likely to do so in the future. Learners play a game and try to distinguish between a human and a computer by asking questions and analyzing the answers. This game is similar to the Turing Test, founded by British mathematician Alan Turing. Variations, extensions, background information and further reading suggestions are included in the PDF.

Explore pressure under and above water. See how pressure changes as you change fluids, gravity, container shapes, and volume.

The speech concepts you have examined in Units 1-8 culminate in the speech project featured in this unit. This unit contains the requirements for the informative speech.  You have already seen most of this material from previous course weeks.  This was to give you an early opportunity to become acquainted with it. You are now viewing the formal folder where you will read the speech requirements and submit your speech outline.  

Learn how to add vectors. Drag vectors onto a graph, change their length and angle, and sum them together. The magnitude, angle, and components of each vector can be displayed in several formats.

Learn how to add vectors. Drag vectors onto a graph, change their length and angle, and sum them together. The magnitude, angle, and components of each vector can be displayed in several formats.

The Virtual Cell Animation Collection currently contains 24 animations in 3D and with motion, which cover many molecular and cellular biology (MCB) topics. The Animation Collection is available on a website (http://vcell.ndsu.edu/animations), a YouTube channel (https://www.youtube.com/user/ndsuvirtualcell), and as an Apple iOS app. Biology education research indicates that 1) multiple viewing of animations increase learning gains beyond a single viewing either before a lecture, as in a “flipped” classroom, or during a lecture, 2) increased learning gains result from engagement with animations over engagement with static graphics, and 3) students perceive that engagement with animations greatly facilitates their understanding of MCB processes.

Make waves with a dripping faucet, audio speaker, or laser! Add a second source or a pair of slits to create an interference pattern.

Watch a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator. Adjust the damping and tension. The end can be fixed, loose, or open.

Watch a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator. Adjust the damping and tension. The end can be fixed, loose, or open.

When is an extremely simple personal calendar program, aimed at the Unix geek who wants something minimalistic. It can keep track of things you need to do on particular dates.

Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!

Test the pH of things like coffee, spit, and soap to determine whether each is acidic, basic, or neutral. Visualize the relative number of hydroxide ions and hydronium ions in solution. Switch between logarithmic and linear scales. Investigate whether changing the volume or diluting with water affects the pH. Or you can design your own liquid!