Counting Techniques
This question set introduces the Fundamental Counting Principle to solve multi-step counting problems. No previous knowledge in counting is required.
Permutations
This question set teaches how many ways a selection can be made if the order matters. The properties of this formula will then be analyzed in the following questions.
Combinations
This problem set goes how to solve counting problems were the order of the selection does not matter. The formula for permutations will be used to derive the formula used to determine the number of combinations.
Lenses
This set of conceptual questions are designed for students after they have just learnt about lenses. It is designed to make sure they understand how ray diagrams work and the properties of lenses.
Vector Addition
This problem set shows visually how vectors can be added together.