Here you can find some listening comprehension exercises in American English. Do not try to understand every single word. Just listen carefully for the information you need to do the exercise. There are several levels: easy, medium and hard. You choose.
Listening activities
EASY
Not All Carrots Are Orange
Got Milk? How to Make Yogurt
Teens, Television, and Depression
Excuse Me, Professor, How Much Do You Earn?
Staying Healthy by Washing Your Hands
Petroleum: A Short History of Black Gold
MEDIUM
Trying to Understand Food Labels
How to Do It: Making Paper by Hand
How Strangers Can Make You Happy
DIFFICULT
Apple's iPhone Makes Quiet Entry in India
New Yorkers Celebrate 125th Anniversary of Brooklyn Bridge