Why does the order matter? Here’s an explanation of the order of operations, its importance, some memory devices and some examples with solutions.
Kindergarten and early elementary level quiz for order of operations. The quiz covers addition, subtraction and multiplication.
After you’ve gone through order of operations in your class, try some of these practice questions on your own to really understand the material. This worksheet includes problems with step-by-step solutions.
Learn here everything from the rules (power rule, constant function and chain rule) to exponential and logarithmic functions. You can look at all the rules for any derivative you need.
A not-quite-exhaustive, but certainly extensive list of trig formulas and identities. Almost everything you might need is here, along with some things you may not have seen yet.