Be sure you are ready to take your exam prior to logging on. Most students will finish the assessment within an hour or so, but you have up to 3 hours. You will need only pencil and paper to work on problems.
You can use a calculator. A TI-83 or 84 is recommended. If you have a different calculator, you need to check here to make sure it is allowed. Calculator models that use symbolic manipulation are not allowed, and the use of such a calculator will result in an invalidated test score and possibly a violation of the Student Code of Conduct.
These models are not allowed: TI-Nspire CX CAS, TI-89, TI-89 Titanium, TI-92, Casio ClassPad II fx-CP400, Casio ClassPad 330 PLUS, Casio ALGEBRA FX 2.0 PLUS, HP Prime Graphing Calculator, HP 49/50 series.