Light Bulb Subtraction - Sesame Street
This short, animated video uses light bulbs to demonstrate subtraction. Light bulbs are taken away one at a time until none are left.
Author(s): No creator set

License information
Related content

Minus 1 Subtraction Facts Presented by Sesame Street
A cartoon peacock demonstrates subtraction when he loses tail feathers. He begins with 5 feathers and loses them one by one.  The number sentence presented each time a disaster takes away one of the tail feathers.   
Author(s): No creator set

License information
Related content

αντιγραφή π,α,πα, π,ι,πι, τ,τα, πίτα, τα , πατατα

http://taksiasterati.blogspot.gr/

Author(s): No creator set

License information
Related content

Communication in health and social care
Whether working with older people, vulnerable children or patients suffering ill health or disability, care providers' ability to communicate is not only useful, but essential. This album provides an invaluable insight into all aspects of communication, with both colleagues and service users. It shows how the difficulties of operating effectively in stressful situations can be overcome and even used as a learning and developmental experience. With contributions from carers and service users, thi
Author(s): The iTunes U team

License information
Related content

Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

Fe, C 1.0 (wt%), hypereutectoid alloy
This secondary electron SEM image shows the cementite delineating prior austenite grain boundaries with a thin layer. The amount of proeutectoid phase is very low, with the majority of the area being taken by the pearlite eutectoid. Again each pearlite cell has a different orientation with the ferrite phase being selectively etched.
Author(s): DoITPoMS, University of Cambridge,Prof T W Clyne,

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

Subtraction 2
In this video, the instructor uses the Paint Program to review how to subtract numbers visually. The instructor also uses a number line. The video is suitable for elementary students.
Author(s): No creator set

License information
Related content

Bubble Gum Subtraction
This animated Sesame Street video uses gumballs to show simple subtraction problems. Different problems are repeated until there are 0 gumballs left. Models counting strategy to find the answer. (1:01)
Author(s): No creator set

License information
Related content

Soil Line and Simple Ratio
Soil Line and Simple Ratio - UNSPECIFIED Keywords:UNSPECIFIED
Author(s): No creator set

License information
Related content

Learning outcomes

After studying this course, you should be able to:

  • develop an appreciation of the huge variety of different mammals that exist on Earth today

  • see how fossil evidence can help us to understand evolutionary history

  • understand how the structure of DNA can help us to detect differences between different species

  • apply the techniques of DNA analysis to work out which mammals are most closely related to each other

  • appreciate t
    Author(s): The Open University

    License information
    Related content

    Copyright © 2016 The Open University

4.7 Jets

You have seen that two kinds of active galaxies - quasars and radio galaxies - are often seen to possess narrow features called jets projecting up to several hundred kiloparsecs from their nuclei. If these are indeed streams of energetic particles flowing from the central engine, how do they fit with the accretion disc model? How could the jets be produced?

The answers to these questions are not fully resolved, but there are some aspects of the model of the central engine which probably
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

2.2 Persistent currents lead to constant magnetic flux

An important consequence of the persistent currents that flow in materials with zero resistance is that the magnetic flux that passes through a continuous loop of such a material remains constant. To see how this comes about, consider a ring of metal, enclosing a fixed area A, as shown in Figure 6a. An initial magnetic field B0 is applied perpendicular to the plane of the ring when the temperature is above the critical temperature of the material from which the rin
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

The Organ of Corti
Situated in the spiral-shaped cochlea of the inner ear is the organ of Corti. Only one inch long if uncoiled, it bears about twenty-five thousand sound receptor cells with hairlike projections arranged in rows on the basilar membrane. Diagrams show detailed structure of the organ of Corti. Grades 5-12. 1 min.
Author(s): No creator set

License information
Related content

9.2 Antisocial behaviour disease

The psychological arena is hugely complex because there are additional issues of responsibility and treatment. Briefly, society takes a more lenient attitude towards the behaviour of someone who is ill (diseased) compared to someone who is well. The diseased person is not fully responsible for their actions (‘They can't help it’). Therefore any individual with antisocial (aggressive) behaviour who is diagnosed as having a disease is largely absolved of blame. Having a disease, means, at l
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

FORMGRIP closed cell aluminium foam
Additions such as SiC are made to molten aluminium or aluminium alloy to modify the melt viscosity and make it suitable for foaming. 1 to 3 wt% of pre-oxidised titanium hydride is then added to the melt which is solidified to form a precursor which can be foamed in a controlled manner by a subsequent heat treatment. The resulting foam has a relatively fine and uniform cell structure.
Author(s): DoITPoMS, University of Cambridge,Dr V Gergely, De

License information
Related content

http://creativecommons.org/licenses/by-nc-sa/2.0/uk/

5 Biomass conversion of solar energy

Photosynthesis in the geological past was responsible for all fossil fuel reserves, but its products are buried about 2000 times more slowly than we use them at present. The total carbon content of all biomass growing on land is estimated to be 5.6 × 1014 kg and, as Figure 10 shows, about one-fifth of this mass is renewed each year. Figure 6 shows how modern plant biomass is distributed across the continents. Clearly, biological conversion of solar energy to a chemical form in com
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

Tissue engineering and stem cell technology
A lecture, "Tissue engineering and stem cell technology" given by Prof ZhanFeng Cui, University of Oxford, at the 10th OIBC Spring Symposium, held jointly with the Department for Continuing Education, at St Edward's School, Oxford, on 4 March 2009. Visit http://media.conted.ox.ac.uk/oibc2 to view the full presentation from Prof ZhanFeng Cui, including his slides.
Author(s): No creator set

License information
Related content

Purple Color Song - Jessica Ferrell
This song and slide show focuses on the color purple. The song is to the tune of "Camptown Races" and shows the word purple and items that are purple. (00:36)
Author(s): No creator set

License information
Related content

2.3 A closer look at ethical issues

Science can define what is practicable, what can be done, but it cannot determine which developments it is right to pursue; this is largely an ethical judgement. One sensible approach in making an ethical assessment is to try to weigh up the benefits of a technology against its potential to do harm. Deciding whether GM technology is acceptable, in ethical terms, then involves a judgement about the plausibility and moral weight of competing sets of claims. Individuals may make widely different
Author(s): The Open University

License information
Related content

Copyright © 2016 The Open University

An introduction to software development
Software development is the practice of organising the design and construction of software, the beating heart of much technology fundamental to our personal and professional life. This free introductory course, An introduction to software development, discusses the engineering nature of software development, its challenges and some fundamental practices which have developed to meet them. Software development is a fast-moving discipline and as a software development professional you must be
Author(s): Creator not set

License information
Related content

Except for third party materials and otherwise stated (see http://www.open.ac.uk/conditions terms and conditions), this content is made available under a http://creativecommons.org/licenses/by-nc-sa/2

Stem Cell Therapies are no More Drugs Than Soufflés are Fast Food
Stemcell discoveries make great news stories, but their actual translation into routine clinical practice is still a major hurdle. Is it reasonable to expect the big pharmaceutical companies to manufacture these living therapies or is the paradigm shift from today’s drugs to ‘living cells as therapies’ overwhelming? Would McDonald’s ever put delicate soufflés on their fast-food menus? This lecture will use examples from current cell and tissue-engineered clinical therapies to illustrate
Author(s): No creator set

License information
Related content