Many factors influence the success and survival rate of a population of living things. Explore several factors that can determine the survival of a population of sheep in this NetLogo model. Start with a model of unlimited grass available to the sheep and watch what happens to the sheep population! Next try to keep the population under control by removing sheep periodically. Change the birthrate, grass regrowth rate, and the amount of energy rabbits get from the grass to keep a stable population.

In this 15 minute video, Paul Andersen explains how feedback loops allow living organisms to maintain homeostasis. He uses thermoregulation in mammals to explain how a negative feedback loop functions. He uses fruit ripening to explain how a positive feedback loop functions. He also explains what can happen when a feedback loop is altered.

Also included is a concept map, slide show, worksheet and transcript of the video.

Transcript added from YouTube subtitles. You can use this to write your own worksheet or quiz.

Strand: Cybersecurity7.6 The student will describe how physical and digital security measures protect electronic information.A network is a collection of computers, phones, servers, network or other devices connected to allow data sharing among users. An example of a network is the internet, which connects tens of millions of people all over the world.There are two types of networks. Private networks are the kind you use at home. Private networks have security measures in place to prevent unwanted or unauthorized connections. Public networks are networks that are often used at schools or hospitals. Public networks are far less secure than home or private networks.

Delve into a microscopic world working with models that show how electron waves can tunnel through certain types of barriers. Learn about the novel devices and apparatuses that have been invented using this concept. Discover how tunneling makes it possible for computers to run faster and for scientists to look more deeply into the microscopic world.

How does energy flow in and out of our atmosphere? Explore how solar and infrared radiation enters and exits the atmosphere with an interactive model. Control the amounts of carbon dioxide and clouds present in the model and learn how these factors can influence global temperature. Record results using snapshots of the model in the virtual lab notebook where you can annotate your observations.

Learning module on regional trading blocs and political unions from the worldwide -- WTO/GATT -- to localized -- EU or NAFTA

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 this lesson students will be able to identify that computers, like the solar system, complete predictable actions based on a set of variables. Students will learn about the solar system via Scratch.  They will explore block coding and computational thinking practices as they utilize Scratch as a tool for creativity, expression and learning about the Solar System. 

Explore your own straight-line motion using a motion sensor to generate distance versus time graphs of your own motion. Learn how changes in speed and direction affect the graph, and gain an understanding of how motion can be represented on a graph.

Semiconductors are the materials that make modern electronics work. Learn about the basic properties of intrinsic and extrinsic or 'doped' semiconductors with several visualizations. Turn a silicon crystal into an insulator or a conductor, create a depletion region between semiconductors, and explore probability waves of an electron in this interactive activity.

Here is a simple lab report that can be used in any science class (6-12). The report is designed to help students identify hypotheses, independent and dependent variables, controls, constants, and to analyze experiments. I have also included tips on a simple way to teach your students to identify the IV and DV through a "cave man hypothesis" and how to teach controls with less confusion.

Included in this resource are a slide show (PowerPoint) and a PDF printable with flashcards that cover the essential knowledge for Computer Science SOL 2.7.Computing Systems2.7  The student will describe the characteristics of computing systems to include hardware, software, input, and output.Feel free to download the slides and make any alterations or additions you feel necessary. 

Investigate what makes something soluble by exploring the effects of intermolecular attractions and what properties are necessary in a solution to overcome them. Interactive models simulate the process of dissolution, allowing you to experiment with how external factors, such as heat, can affect a substance's solubility.

This resource provides a lesson of editable items on solving inequalities with negative coefficients, which cover SOL 7.13. The resources can be used for a Math 7 course, an accelerated math course that incorporates Math 7 standards, or as review in preparation for Math 8 or higher-level content. 

This resource provides a unit of editable items on solving two-step and multi-step inequalities which cover SOLs 7.13 and 8.18. The resources can be used for a combined Math 7/8 curriculum or can be broken up by grade level  and used in pieces

Slides describing the site and situation of Southside VA as well as a discussion of the political, economic, and cultural evolution of the region from a geographical perspective.