With the new specification being incredibly difficult for even the brightest students; I have devised a general PowerPoint on how to write ionic half equations.
The PowerPoint starts with general definitions, moving onto identifying ionic substances that will dissociate in water. This then leads towards writing net ionic equations and then understanding further on how ionic half equations are written in terms of OILRIG.
I used this has a WHITEBOARD lesson and it worked brilliantly
Furthermore, this can also be used without whiteboards for the brighter and more able kids
Hope it helps