Is there life after O/A-Levels? Definitely! How well a person does in tertiary education is correlated with job opportunities open to the person. Discuss issues pertaining to nstitutes of higher learning here.
Depending on JC, the Graphic Calculators that are commonly used is TI81 plus by Texas Instruments. If you are majoring in Mathematics in the University, The GC mentioned will come to great use. =) Cheers