Greek history in 18 minutes in a effective and fun way. Speed learn about marathons, democracy, the alphabet, Olympics, Gods, Trojan war, Homer. . 
Pro tip:  Go fullscreen, then hit "Quiz" and dive into even more resources. 

How to calculate to get the probability of getting 11 with two dice

Goods are any items that satisfy human needs and wants. They are material items that you can purchase. Anything that you can find in a grocery store, farmer's market, shopping mall, home improvement shop, or any other store is a good. These might include: fruit; vegetables; cell phones; train tickets; coffee from a coffee shop; etc. 

How is trade patterns changing, and why? Globalisation is one of the main accelerators of change globally. Check out this video on globalisation and how it is changing the way of production and trade patterns: 

Have you ever come across the problem of understanding how warm or cold it is when the temperature is given in Fahrenheit or vice versa, if you live in the US, in Celsius? Wouldn’t it be convenient if you could have a machine that would do the conversion for you? This is what functions do: You input something, and it is given as output as something else according to a rule.

Let’s learn the theory about Functions:

What events do you think was most important and influential to today's society?
Maybe one of these? Roman empire, Alexander the Great, Greek culture, Pax Romana, Jesus, Muhammed, Genghis Khan, The Black death, The fall of Constantine, The Renaissance, The Gutenburg printing press, Protestant reformation.

European colonialism, American revolution, French revolution, The American civil war, Industrial revolution, The medical revolution,  WW1 and 2, The russian revolution, The great depression, Cold war, Sputnik, JFL assasination, Digital revolution. 

Physical activity refers to all movement that is done to improve your health. Both moderate- and vigorous-intensity physical activity can improve one's health. Popular ways to be active are for example walking, cycling and doing sports.

• Prevents and manages many diseases such as cardiovascular diseases, cancer and diabetes
• Reduces symptoms of depression and anxiety
• Enhances thinking, learning and judgement skills
• Improves overall well-being
• Helps you control your weight

Improving your MENTAL health:

• Physical activity releases chemicals like endorphins and serotonin that improve your overall mood
• Physical activity reduces stress, depression and anxiety and it can also help you recover from mental health issues
• It improves your sleep

What is light and colours? Light is made up of energy and travels in a straight line in 299 792 km per second. Travelling at the speed of light, you could go around Earth 7.5 times in a second.