1. ATP gives a phosphate group to Glucose, which now turns into Glucose 6 Phosphate
2. Glucose turns into it's isomer Fructose (They're like bros: same chemical formula, just different atom arrangement)
3. ATP gives another phosphate group to Fructose, which now turns into Fructose 6 Biphosphate
4. There's a split up now: G3P and DHAP. DHAP converts to G3P b/c they're isomers (aka bros) so after a bit of atom switching we have 2 G3P
5. G3P loses 2 electrons and 2 protons b/c of the energy released in the earlier conversion. NAD+ takes the electrons and 1 proton to reduce to NADH H+
6. 1,3 BPG gives a phosphate group to ADP who now turns into ATP
7. A phosphate group is just changing it's position : going from 3 Carbon to 2 Carbon because it can
8. Water leaves 2PG and we have Phosphoenlpyruvate
9. Now Phosphoenlpyruvate loses it's last phosphate group and ADP takes it, to make ATP
NOTE
We have 4 ATP made in total, but since ATP from steps 1-3 gave they're phosphate group, we only have 2 ATP in profit
Where does NADH H+ go? Well because it took those electrons, it goes to the Electron Transport Chain where it the electrons will be put into use.
Picture reference
(PixShark, 2015)