Before you take a look at these, please allow me to invite you to check out my recent series on Differentiation. You can find an introduction to derivatives and differential calculus here, and then follow-up posts on an elementary differentiation technique and the power rule.

- Stretching and Compressing Graphs. Long live the king! This is far and away one of my most popular posts, ever since its original posting nearly 6 years ago! Pay it a visit to see what everyone is talking about.
- Converting Point-Slope Form to Standard Form. Another popular post, explaining how to go about converting your equation from point-slope to into standard form. Along with slope-intercept form, these are the most common ways of expressing equations easily so that they can be graphed, so it's essential to understand how to convert between them.
- Which Measure of Central Tendency to Use? Mode, Mean, or Median? Do you know the differences between these three measures of "center?" Where would you use a mean, and when would it be most appropriate to use median or mode. Read my post to get some tips to help you choose the best method!
- Special Angles in Trigonometry. If you memorize - or better yet, understand - what these special angles are and how you can find them, then they will make working with triangles in trigonometry a lot easier!
- Graphing - Parallel and Perpendicular Lines. Graphing parallel or perpendicular lines is a very common task in learning mathematics. In this post, I explain just what these terms mean, and specifically answer the question of how to determine if two lines are exactly perpendicular or not.

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