Method for balancing somewhat complicated reactions

[studentteacher]

What's a good way to teach freshman high-school students how to balance this:

 

__ KMnO₄ + __ HCl --> ___ KCl + __MnCl₂ + __H₂O + __Cl₂

[hypervalent_iodine]

That reaction requires you balance it via half equations, so the obvious approach is to start with basic versions of those and work up to balancing them in acidic and basic solutions.

[Sriman Dutta]

You can try either of the following:- oxidation number method or ion electron method.