Did you know that some research studies have shown you can forget up to 90% of what you've learned in less than a week? Other studies show we retain half of what we've learned for 30 days. What's most important though; over time, we all slowly forget what we've learned. One effective strategy for improving retention is note taking – not just because you'll have a written record to refer to in the future, but also because the actual act of taking notes can help reinforce concepts in your mind.