<p>My AP Calc teacher (who’s been teaching it for about 30 years) has encouraged us to bring two - while one is busily graphing a problem or solving something intricate, she says we can use the other one if need be.</p>
<p>My AP Calc teacher (who’s been teaching it for about 30 years) has encouraged us to bring two - while one is busily graphing a problem or solving something intricate, she says we can use the other one if need be.</p>