The different scales of evolution.
The different types of terrestrial biomes.
The different types of aquatic biomes.
The different types of nuclear reactions.
The different types of sentences.
The different types of characters.
The differences between elements and compounds.
The different types of chemical reactions.
Understanding the different characteristics of waves.
How to recognize special products of polynomials.
How to factor perfect square trinomials.
How to graph a basic rational equation.
How to find the general term of an arithmetic sequence.
How to find additive and multiplicative inverses.
How to use the sine and cosine addition formulas to prove the double-angle formulas.
How to approximate the area under a curve using rectangles.
How to compute the sum of two vectors or the product of a scalar and a vector.
How to create the different conic sections.