Capitalization
Spelling
Punctuation
Tenses
Singular vs. Plural
100

Studying the effects of these potent venoms is dangerous work, but Scientists say that it’s worth the risk, especially if one of these “killer venoms” can actually save lives someday.

Change Scientists to scientists 

100

Even worse, the jellyfish tentacles become extra sticky when their in contact with skin, so trying to remove them can make a sting even more severe.

Change their to they're

100

Its estimated that at the start of the 20th century, there were over 100,000 tigers living in the wild.

Change its to it's

100

The designs are more sophisticated, and my dreams had broadened.

Change are to were 

100

Moss, who also protects the elephants from poachers, says 85 percent of the world’s wild elephants was killed between 1979 and 1989.

Change was to were

200

The great barrier reef of Australia is a supreme example of the mysteries of the natural world because of its wide variety of plant and animal life.

Change great barrier reef to Great Barrier Reef

200

Just a few microliters of this venom, less then the amount most eyedroppers hold is enough to kill 10 people!

Change then to than

200

Although I was to old to cry about the situation, tears threatened to spill down my cheeks' anyway.

Change cheeks' to cheeks

200

At my previous school, where I am president of the eighth-grade class I learned a lot about what it means to organize my time effectively.

Change am to was 

200

Katy Payne, who records songs of humpback whales, was helping Moss record elephant sounds.

Change was to is 

300

On south america’s lake titicaca, the night sky glitters with stars that seem close enough to touch. 


Change south america’s lake titicaca to South America’s Lake Titicaca

300

There are still corners of the world that have not been seen by human eyes, perhaps with surprises just as dazzeling as the Cave of Crystals.

Change dazzeling to dazzling 

300

When they are dreaming people's eyes move rapidly, and their brains emit small, fast waves.

Change people's to peoples

300

This innovative program was bringing an important disease-fighting tool to people around the world.

Change was bringing to is bringing 

300

As a public speaker, his poetry readings has become popular with college students.

Change has to have

400

It is a place that deserves protection, a true Oasis of life.

Change Oasis to oasis

400

As we began to open up to each other, I started to see how Kaitlyn and I were really alot alike.

Change alot to a lot

400

I admired her ability to pick up a split; and also appreciated her advice.

Remove the semi-colon

400

The castles he build allow the Norman lords to retreat to safety when threatened by English rebellion.

Change build to built

400

But these plastic bags didn’t come into widespread use until around 1980, and before that time people got along just fine without it.

Change it to them

500

I probably would have continued trying to keep up with “Big T” for the rest of my high school career, but when my family moved in the middle of my Freshman year, everything changed.

Change Freshman to freshman

500

Blanco, through conferences and non-profit organizations, has performed his poems across America.

Change non-profit to nonprofit

500

In this way castles served both offensive, and defensive roles in military operations.

Remove the comma

500

How is it possible that such a unique island comes into existence?

Change comes to came 

500

During an eight-hour sleep most people experiences three to five periods of dreaming. 


Change experiences to experience