I'm having argument with a colleague of mine over which statement is more correct. I figured the English language gurus of StackExchange would be able to set us straight.
closed as unclear what you're asking by RegDwigнt♦ Dec 16 '13 at 10:25
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Neither statement is incorrect.
To determine which is "more correct" is really a matter of what context you're using the statement in.
When considering "What I've learned" I find it helpful to take out the contraction and think of it as "What I have learned"
So for example you might prefer to say "What I have learned over these past few days..." than "What I learned over these past few days."
As another example you might also prefer to use "What I Learned Today" as a title over "What I've Learned Today."
Both are correct. My gut instinct is that "what I learned" sounds more like you're referring to a specific (shortish) period of time, eg.:
What I learned today was that I like asparagus.
What I learned during the 2 week course was invaluable.
... whereas "what I've learned" is more general, or at least refers to a longer time period, eg.:
What I've learned in life is to avoid poisonous snakes.
What I've learned at college is that kids don't like to learn.
It depends on context. Either can be grammatically correct. If the powerpoint presentation is a summary of your first year at your current job, "What I've learned" might be more appropriated. If you are recounting a conference you went to two months ago, "What I Learned" could be the better choice.