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Video 1: How to calculate the area of a parallelogram
Video 2: Examples relating to calculating the area of a parallelogram
Video 3: Common mistakes made when calculating the area of a parallelogram

Note: After watching each video, click on the 'back button' to return to the VLE

Video 1: How to calculate the area of a trapezium
Video 2: Examples pertaining to calculating the area of a trapezium
Video 3: Common mistakes made when calculating the area of a trapezium

Note: Click on the 'back button' after watching each video, in order to return to the VLE

These two short online tutorials discuss how the earth rotates and then the earth's revolutions.

In the first URL, the YouTube video explains why earth has spring, summer, autumn and winter seasons. The second URL summarizes the key takeaway points.

How to solve for the horizontal displacement when the projectile starts with a horizontal initial velocity. We also explain common mistakes people make when doing horizontally launched projectile problems.

• Predict, qualitatively, how an external force will affect the speed and direction of an object's motion.
• Explain the effects with the help of a free body diagram.
• Use free body diagrams to draw position, velocity, acceleration and force graphs and vice versa.
• Explain how the graphs relate to one another.
• Given a scenario or a graph, sketch all four graphs.