Here are some notes to help with problem solving
How to problem solving. Tips from a chemistry prof, useful to anyone.
Units and unit conversions
Common unit abbreviations
Logarithms and e
A refresher on algebra and trigonometry. Even if this material is completely new to you, with enough motivation and persistence you should be able to understand it. And if algebra and trig are old hat to you, rest assured that you will still find here some unexpected goodies.