[WilliamEdward]

You didn't read their first point - if you're going to be wrong, do so in private. You should be making as many mistakes as possible at home or after hours so that by class or test time you never make them again. Mistakes are a way of learning but not a way of doing. After all, the entirety of life was built with 1 tool - the mistake.

[jjjensen90]

Wait a minute, mistakes are a "way of learning" but you should avoid them in school?

[WilliamEdward]

You should avoid them when trying to produce actual good work and results, obviously. Before that point, make as many as you want so you can learn how to produce flawless results.