Results

Part 1: Adding integers
Part 2: Examples of adding integers
Part 3: Common mistakes made when adding integers

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.

The division and multiplication of integers
Order of operations

Part 1: Multiplying integers
Part 2: Examples of multiplying integers
Part 3: Common mistakes made when multiplying integers

• 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.

Part 1: Representation, comparison and ordering of integers on the number line
Part 2: Examples related to the representation and comparison of integers on the number line
Part 3: Common mistakes and misconceptions

This YouTube video explains how river basins are formed.

Part 1: Subtracting integers
Part 2: Examples of subtracting integers
Part 3: Common mistakes made when subtracting integers

This YouTube documentary highlights the ecological and socio-economic importance of the Tana River Basin in Kenya.

This 32 minute long YouTube video investigates the water contamination problems in Tanzania, with specific focus on Dar Es Salaam.