There are three steps in the Calvin Cycle;
1. Carboxylation: RuBP fixes CO2to form GP. This reaction is catalysed by the enzyme Rubisco
2. Reduction: In a series of reactions GP reacts with ATP and NADPH reduced GP to form GALP (by reducing GP the NAHPH itself is oxidised, reverting to NADP)
3. Regeneration: Some GALP is converted back into RuBP so the Calvin Cycle can continue. The rest of GALP is converted into glucose in a series of reactions.
A glucose molecule is generated every 6 turns of the Calvin Cycle.