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Roland Gesthuizen

Spirogyra - Filamentous Green Algae - YouTube - 3 views

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    "This particular algal species, commonly found in polluted water, is often referred to as "pond scum". As the movie switches to a 20x lens and then the 40x, watch closely, toward the center of each cell in the strand, for the cell nucleus. It's right near the middle and shows as a round object that is near transparent, but once you see it, you will see others. "
Roland Gesthuizen

NOVA | How Cells Divide - 11 views

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    Step by step comparison interactive guide between mitosis and meiosis
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    NOVA animation comparing mitosis and meiosis.  Also includes brief explanations of what happens in developing egg cells versus sperm.
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    "Most of the time, when a cell in our bodies divides, each new cell carries a complete set of chromosomes. The cells involved with human reproduction, however, carry only half after division occurs. In this step-by-step explanation, learn about mitosis and meiosis, the two types of cell division."
Roland Gesthuizen

A Community of Practice for Early Career Biology Teachers: Social Networking and Digita... - 5 views

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    "The challenge for science teacher educators is to develop pedagogies and employ technologies which embrace "communities of practice" as core to both science practice and teacher learning."
A Gardner

Histology virtual slide box - 11 views

  • Virtual slides available on the Web from universities and other sources
S. Goodrich

NCSSM Distance Learning T.I.G.E.R. - Chemistry Graphics page 2 - 11 views

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    Great animations
Roland Gesthuizen

ANZ imposter takes up new climate tactic - 0 views

  • When talking to young climate activists it soon becomes apparent that they feel they have been abandoned by their elders, whom they see as bequeathing them a world no-one would want to live in.
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    "The longer-term effects of Moylan's hoax on Whitehaven Coal and the fossil fuel industry more broadly have yet to be seen. It may prove to be no more than a cri de coeur, but it does raise afresh the question of the use of civil disobedience in climate campaigns."
Holly Barlaam

Propagation of the Action Potential - 8 views

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    animation of neuron action potentials showing changes in charge
Holly Barlaam

HowStuffWorks "Contracting a Muscle" - 9 views

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    Contracting a muscle--animations showing the steps of contraction and useful rope analogies
Cornélia Castro

Get popular free downloadable tools to use in the classroom - 13 views

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    Microsoft resources & tutorials
Roland Gesthuizen

A world like ours, maybe, or too smart to say - 5 views

  • If the planets exist, they orbit a star about twice as old as our own, so a suitable planet has had plenty of time to develop life much more advanced than Homo sapiens. That may just explain why no one from Tau Ceti has ever contacted beings as primitive as us.
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    "ASTRONOMERS have discovered what may be five planets orbiting Tau Ceti, the closest single star beyond our solar system, the temperature and luminosity of which nearly match the sun's. If they are planets, one is about the right distance from the star to feature mild temperatures, oceans of water, and even life. Don't pack your bags just yet, though: the discovery still needs to be confirmed."
Roland Gesthuizen

Earth's seasons demo part 1 - YouTube - 2 views

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    "This demonstration shows pupils how the seasons on Earth are due to the Earths angular tilt and its orbit around the Sun. It also shows how you can demonstrate the seasons with easy experiments in the class room."
Roland Gesthuizen

Why Doesn't the Moon Crash Into the Earth? | Wired Science | Wired.com - 6 views

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    "So, the Earth pulls on the moon because of gravity? Why doesn't the moon get pulled into the Earth and crash? What a great question."
Roland Gesthuizen

Straw Rocket Construction - YouTube - 7 views

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    "Here's how to build a straw rocket from paper, sticky notes, and tape using just a pencil and scissors. The sticky notes allow students to easily change the tail fins to see what works best. Fifth grade students constructed straw rockets like this during engineering week talks at elementary schools. "
Roland Gesthuizen

The VARIABLES Song - Mr. Edmonds - Rock with the Jackson 5 "I'll Be There" music theme ... - 4 views

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    Science song that illustrates the difference between a control, dependent and independent variable.
Roland Gesthuizen

Roland Gesthuizen - Google+ - Had fun today at #stav2012  showing junior scie... - 0 views

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    "Had fun today at #stav2012  showing junior science videos, including this one I made a few years ago for +BlipTV where I used glove puppets to teach multicelular organisms."
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