PBS
The Return of Trolls in Folklore and Literature
As science and formal education spread, belief in trolls began to fade until a resurgence of folklore interest in the 19th century. Danish author Hans Christian Andersen included trolls in his fairy tales, and Norwegian illustrators like...
Curated Video
Células madre: origen de la especialización celular
Células no especializadas que se pueden subdividir repetidamente o transformarse en distintos tipos de células especializadas.
Twig - Biología
Science ABC
Why Heart Cancer Is So Rare It (Almost) Never Happens
The heart is practically immune to getting cancer. 2 in 100,000 of those who have cancer are those with a primary cancer of the heart. That is an astonishing low number. So, what is so special about the heart that it rarely, if ever,...
Science ABC
Why Are There '24' Hours In A Day?
The 24-hour day concept comes from the ancient Egyptians. They divided the day into 10 hours with devices like shadow clocks and then added one hour at each end (one for twilight and one at the end of the day). Later, a T-shaped bar was...
Curated Video
Valence Electrons & Lewis Dot Diagrams - what are they and how do I draw them?
Valence electrons are the electrons in the outermost energy level of an atom. They are important because they are involved in the chemical bonding of our elements which helps determine the reactivity of elements. In order to be stable,...
Curated Video
Warning: You're Probably Factoring out Negative Numbers WRONG
Whether you're just starting out, or need a quick refresher, this is the video for you! Mrs. C will go show you step-by-step how to factor out a negative number in an algebraic expression.
Curated Video
Solve this Power!
Whether you're just starting out, or need a quick refresher, this is the video for you! Mrs. C will go through how to solve this negative mixed number raised to the 3rd power, step-by-step.
Curated Video
Mastering Factoring: A Complete Guide to Factoring Algebraic Expressions
Whether you're just starting out, or need a quick refresher, this is the video for you! Mrs. C will go show you step-by-step how to factor an algebraic expression, using different methods and several examples.
Curated Video
How to Factor an Expression using the GCF
Whether you're just starting out, or need a quick refresher, this is the video for you! Mrs. C will go through two different methods, a traditional method and the Ladder Method to factor algebraic expressions step-by-step.
Curated Video
Factoring Out Coefficients Made Simple
Whether you're just starting out, or need a quick refresher, this is the video for you! Mrs. C will go show you step-by-step how to factor out a coefficient in an algebraic expression.
Curated Video
Are You Solving Complex Fractions the Wrong Way?
Whether you're just starting out, or need a quick refresher, this is the video for you! Mrs. C will go through how to solve and simplify complex fractions step-by-step.
Curated Video
Mean
The average value of a set of data, calculated by adding all the values and dividing by the number of values. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual...
Curated Video
Asexual reproduction
Reproduction involving just one parent, without the mixing of genetic material with another individual. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
Curated Video
Stem Cells: Unlocking The Potential to Regenerate Tissues
Revealing the amazing and unique properties of stem cells, and how they can be used to regenerate tissues. Biology - Cells And DNA - Learning Points. There are three different types of stem cell: embryonic, foetal and adult. Stem cells...
Curated Video
The History of the Golden Ratio
How the Golden Ratio was discovered and used through time, from architecture to art to music. Maths - Measurement A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s context films show abstract concepts...
Curated Video
Settlements and Apartheid
The impacts of racial segregation on settlement patterns in Johannesburg, and the legacy this leaves today. Human Geography - Orientation And Settlements - Learning Points. Apartheid (Afrikaans for 'apartness') was a series of policies...
Curated Video
Fractions: Slow Motion
Discover how video creates movement from still images, and how 'frame rate' affects what we see. Maths - Number A Twig Math Film. Reinforce and extend the learning required by the curriculum. Twig’s math films show abstract concepts in...
Curated Video
Stem Cells: Versatile Cells with the Potential to Specialize
Unspecialised cells that can divide repeatedly and develop into different types of specialised cell. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise textual definitions....
Curated Video
What is a map? – Clip
Find out how maps are used to show political divisions within a country. People and places - Mapping - What is a map? A Twig Tidbit Film - Clip. A short film that extends the learning beyond the curriculum.
Curated Video
The spread of disease
Discover how a disease can spread from person to person. Life processes - Humans and other animals - Reducing the spread of disease Learning Points Microorganisms such as viruses and bacteria spread disease. The immune system sends white...
Curated Video
How to Calculate Molarity | Chemistry Made Easy
Calculating molarity is as easy as plugging numbers into the triangle and using your calculator to either multiply or divide the numbers given in the problem. Calculating molarity is important in chemistry as molarity is a common...
Curated Video
The Equations and Inequalities: The Operation on the Inequalities
By the end of this learning object, the student will be able to: Summarize the lesson & understand how to solve any inequality.86708
Curated Video
Geometry and Measurement: The volume of a Cube
By the end of this learning object, the student will be able to: Use two ways to get the number of small cubes to put these cubes in the cuboid.4584