Algebra Tiles - A Virtual Manipulatives
Click on any of the buttons below the workspace to add a tile to the workspace. Drag the tile to the desired location on the workspace. Dragging a tile to the left or bottom axes will make it a factor of a product you are representing.
Rotate tiles
Move your mouse over the corner of a tile. A round dot will appear that can be used to rotate the tile by moving the mouse in a circular motion. When you release the mouse

Author(s): No creator set

In this section, you have learned about appropriate ways of interpreting data in tables. By working through examples, you have seen how it can be useful to calculate appropriate proportions and ratios, and to present some of the data in graphical form. Guidelines for the choice of graphics have been given. When the data in a table are in the form of counts, you have seen that it can be useful to calculate the counts in a particular row or column as proportions (usually in the form of percenta
Author(s): The Open University

An approach is a way of going about taking action in a â€˜real worldâ€™ situation, as depicted in Figure 20. As I have outlined earlier, an observer has choices that can be made for coping with complexity. Here I am assuming that because this unit is about systems approaches, a choi
Author(s): The Open University

During the press conferences of recent FOMC meetings, millions of well-educated investment professionals have been sitting in front of their screens, chewing their fingernails, listening as if spellbound to what Janet Yellen has to tell them. Will she finally raise the federal funds rate that has been zero bound for over six years?

Obviously, each decision is accompanied by nervousness on the markets. Investors are fixated by a fidgety curiosity ahead of each Fed decision and never fail
Author(s): Ronald-Peter StÃƒÂ¶ferle

"U.S.-Cuban Academic Relations Part I: The Politics of U.S.-Cuban Exchanges"
Wayne Smith, Center for International Policy and Louis PÃ©rez, University of North Carolina-Chapel Hill.
U.S. and Cuban scholars involved in academic, scientific, and cultural research face significant difficulties in maintaining open and thorough dialogue with each other due to restrictions governing travel between the two countries. Such

Author(s): The Center for International Studies at the Univer

A potential problem for the feature integration theory is the fact that the time taken to understand the meaning of a printed word can be influenced by other, nearby words. Of itself, this is not surprising, because it is well known that one word can prime (i.e. speed decisions to) another related word; the example nurse â€“ doctor was given in Secti
Author(s): The Open University

Tectonic Plates and Plate Boundaries (WMS)
The earths crust is constantly in motion. Sections of the crust, called plates, push against each other due to forces from the molten interior of the earth. The areas where these plates collide often have increased volcanic and earthquake activity. These images show the locations of the plates and their boundaries in the earths crust. Convergent boundaries are areas where two plates are pushing against each other and one plate may be subducting under another. Divergent boundaries have two plates
Author(s): No creator set

Four Quarts make a Gallon
See what a: cup, pint, quart and gallon are in this short video clip. This silly (yet informative) video uses a 'Singing Rubber Chicken' to describe these common liquid measurements.
Author(s): No creator set

The document attached below includes the seventh section of Mountain building in Scotland. In this section, you will find the following subsections:

• 7.1 Introduction

• 7.2 Mid-Ordovician to Silurian sedimentation in the Midland Valley Terrane

• 7.2.1 Ordivician sedimentation

• 7.2.2 Silurian sedimentiation

• 7.2.3 Summary of Section 7.2

• 7
Author(s): The Open University

This is an introduction to the physics of atmospheric radiation and remote sensing including use of computer codes. Subjects covered include: radiative transfer equation including emission and scattering, spectroscopy, Mie theory, and numerical solutions. We examine the solution of inverse problems in remote sensing of atmospheric temperature and composition.
Author(s): McClatchey, Robert,Prinn, Ronald G

This free course provided an introduction to studying Sociology. It took you through a series of exercises designed to develop your approach to study and learning at a distance and helped to improve your confidence as an independent learner.

Author(s): The Open University

Local Exchange and Trading Schemes (LETS) expanded rapidly in the UK after the first scheme was set up in Norfolk in 1985. By 1996 LETSLINK UK, the coordinating body, reckoned that there were about 450 LETS in the UK, with 40,000 members. LETS exist in most western European countries â€“ in Australia and New Zealand, the US, Canada and Japan. Their origins lie in Canadian attempts to revive local traditions of skills exchange and barter outside commercial and international labour markets and
Author(s): The Open University

This brief review of leadership theories has indicated that there are no simple answers to what it is that makes some leaders more effective than others, and no single best leadership style or approach. What matters is that the style adopted should fit with the expectations of those being led and be consistent with the task at hand (that is, it should not ignore the specific characteristics of the task itself).

There are no simple answers, which is perhaps why this continues to be the s
Author(s): The Open University

9.012 The Brain and Cognitive Sciences II (MIT)
This course is the second half of the intensive survey of brain and behavioral studies for first-year graduate students in the Brain and Cognitive Sciences curriculum. Each module of this core course involves a series of overview lectures by leading researchers in the field. By offering a thorough introduction to the current state of the discipline while emphasizing critical thinking, the course aims to prepare students as cognitive scientists. Topics include: perception, attention, working memo
Author(s): Miller, Earl,Kanwisher, Nancy

In your studies of the learning courses so far, you have investigated a range of factors that may lead up to the â€˜perfect stormâ€™: a combination of interlinked environmental, social and economic crises. You have also explored your personal ecology, extending this to incorporate quality of life and environmental impact aspects. You have done this using a range of verbal, visual and mathematical models.

You have also become familiar with the fact that our mental models evolve through
Author(s): The Open University

Ã‰coutez et notez la date:

A major pressure for change in the way that social welfare services were provided and organised in the latter half of the twentieth century came from the voluntary sector. In this course, you will hear from three generations of members of Bedford Mencap society, describing how they brought pressure to bear for more community facilities aimed at people with learning difficulties and their families.

The audio clips were recorded in 2000.

Participants in the audio clips:

Author(s): The Open University

TÃ©cnicas de InvestigaciÃ³n Operativa en IngenierÃ­a
El curso trata de mostrar una visiÃ³n amplia de las tÃ©cnicas que se recogen bajo la denominaciÃ³n de InvestigaciÃ³n Operativa (IO), agrupÃ¡ndolas en tres grandes bloques (mÃ©todos deterministas, mÃ©todos probabilÃ­sticos y otros mÃ©todos como simulaciÃ³n, toma de decisiones, participaciÃ³n pÃºblica). Dentro de cada bloque se expone brevemente en quÃ© consiste cada mÃ©todo y se acompaÃ±a con ejemplos y ejercicios de aplicaciÃ³n.
Author(s): Susana MartÃƒÂ­n FernÃƒÂ¡ndez,Esperanza Ayuga TÃƒÂ©llez,

1 The diagram below shows an oatmeal cake marked into 12 equal portions. I want to give my sister a third of the cake. Where could I cut the cake, and what would be left over?

Author(s): The Open University

A class of small RNA molecules called micro-RNAs (miRNAs) has been identified in recent years. The roles of these small RNAs are only just beginning to be understood, but many are expressed only at specific developmental stages. Indeed, the first observations of miRNAs were made in C. elegans because of their mutant developmental phenotypes. The genes that encode these miRNAs are called mir genes (pronounced â€˜meerâ€™) and have now been identified within the genomes of v
Author(s): The Open University