10 Common Writing Mistakes

It’s 2am and your paper is due at 9am. Your eyesight is blurry from looking at your computer screen. All you want to do is finish and go to sleep. So you turn your paper in without proofreading.

Then you get your paper back: C+. C+? You look through your professor’s edits and come across this:

“The principle point of this paper is to explore the affects of whether on gorilla warfare in Asian.”

Don’t let this happen to you. Use this checklist to help avoid 10 common student writing errors.

1. Missing a comma

Commas and periods are the two most used punctuation marks, but commas seem to cause the most confusion. Are you using commas correctly? Have you written any sentences containing items in a series? When three or more items appear in a series, they should be separated from one another using commas. (The last comma is optional, though.)

Example: We’re out of milk, eggs, and cheese.

Bonus tip: Always use commas to set off names or titles of a person when directly addressing someone.

Screen Shot 2014-09-26 at 10.02.47 AM2. No comma after an introductory phrase

An introductory phrase provides background information and is usually followed by a comma.

Incorrect – While I was studying my roommate watched TV.

Correct – While I was studying, my roommate watched TV.

3. Using the wrong word

Whether/weather. Affect/effect. To/too. While all are spelled correctly, they each mean different things. Watch your words and don’t rely on spell check alone. Spell check may not see words which are misused, but spelled correctly!

affect-vs-effect

4. Run-on sentence

Run-on sentences occur when a sentence contains two complete thoughts without the necessary punctuation to link them. Run-on sentences should be divided into separate sentences or joined by adding words or punctuation.

Example: Mr. Smith sent all of his kids to college, however, he has sacrificed his health working to pay for it.

Where the first comma appears, we should have used a period and started a new sentence.

5. Watch your verb tenses

All the verb tenses should work together in harmony.

6. Pronoun shift

This occurs when an author switches pronouns for no apparent reason. I > you > one

Incorrect – If you eat sensibly and watch your calories, most people will be able to maintain their weight.

Correct – If you eat sensibly and watch your calories, you should be able to maintain your weight.

7. Spelling Mistakes

Mistakes happen, but make sure you stop and review your writing for errors. Having someone else review your writing will also help ensure that all mistakes get corrected.

stop error

8. Its vs It’s

For many people, this is one of the trickiest grammar rules. Use its to mean belonging to it; use it’s only when you mean it is or it has.

It’s is a contraction for it is or it has. “It’s almost the weekend.” Its indicates possessive. “Every dog has its day.”

Its’ is never correct. Ever.

9. Double Negatives

You know the old adage ‘two wrongs don’t make a right?’ Well two negatives do make a positive.

Incorrect: I cannot hardly wait for the semester to be over.

Correct: I can hardly wait for the semester to be over.

double negative

10. Mechanical error with a quotation

“I wish we were at the beach”, Elizabeth says.

The comma should be placed inside the quotation marks.


This list has some brief example and explanations for you to use as reminders while you edit papers. Have a paper you’re struggling to format? Or just want another set of eyes to help you proofread? Connect with a great writing tutor now.

Overwhelmed with college admissions?

The college admissions process can be confusing and cumbersome. What are the college admission requirements? What should your personal essay say? What schools fit your checklist? What should your test scores be?

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InstaEDU now has professional college admissions counselors!

Whether you’re struggling with formatting your personal statement or just want advice on how to tackle the process— we have you covered.

Meet some of our college counselors:

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“I have been working with students for the last 18 years. I love my profession and love helping students.” 

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“I am able to explain many of the tricky, technical languages that many colleges use in their application process.” 

Connect with a college counselor now.

5 Things No One Tells You About College (Until It’s Too Late)

Coffee, pizza and late-night library cram sessions are old news, but what about the things no one tells you about your freshman year— things that will help you better manage your time, ace your classes and feel sane come finals? Here are 5 things every freshman should know:

5 things no one tells you about college

1.Your Grades May be Based on 2 Exams (and nothing more)

A midterm and a final often determine the entirety of your grade in a class (though, depending on the class, a midterm or final could be a paper instead). There probably won’t be any opportunities for extra credit. You need to study and (yes) go to class. Missing lectures and skipping class means you’ll be missing out on valuable material that will inevitably be included on the exam. So go to class!

2. Just Because You Don’t Have Homework Doesn’t Mean You Don’t Need to Study

Without daily homework assignments, it’s easy to put off reading and assignments. However, professors still expect you to keep up with the syllabus and be accountable for assigned reading. You need to study to keep up and stay ahead of the class. Flash cards, study groups, tutoring — find a study method that works for you and then stick with it.

3. You’ll Be Forced to Take Classes You Don’t “Need”

Electives are classes that are not part of your core area of study, and you’re usually required to take a number of electives throughout the year.

The upside is that these classes can give you an opportunity to try something new, and provide a break from your normal course load. Art history? Pottery? Mandarin? Don’t be afraid to try something that’s outside your comfort zone; this is a great time to explore what you’re passionate about.

4. Failing a Class Can Cost You Financially

Nobody wants to fail a class, but flunking a class can not only hurt your moral… it can also impact your financial aid. Not to mention you’ve already spent money to rent or buy textbooks (new semester = new edition) and class enrollment. Plan ahead and get the help you need if you think you’re in danger of failing.

5. Everyone Needs Extra Help In Tough Classes

Even the smartest students get challenged in college. The good new is that there are tons of resources to help you out, so don’t be afraid to ask for help! Tutoring can not only save you from failing a class; it can also provide an opportunity for you to make sure you are on track. No matter what the subject, or the time of day, InstaEDU has online tutors who can help 24/7.

Tutor Talks: College Admissions Essay Help from University of Pennsylvania’s Anastasiya

School is back and session, and many high school seniors now have the impending task of beginning their college admissions essays. See how InstaEDU tutor, and University of Pennsylvania student Anastasiya K. tapped into a unique life experience to find inspiration for her writing prompt.

Anastasiya-K. shares here college admissions essay writing tips

Anastasiya-K. shares her college admissions essay writing tips

How early did you start writing your main college admissions essay?

I started writing in early Fall (probably September or so) of my senior year.

What was your approach to starting the writing process?

Even though my main essay was a response to an already determined topic, the first thing I did was brainstorm qualities that set me apart from other students, qualities that made me unique. After that I incorporated these qualities in my essay, connecting them to the topic in the best way I could.

What was your essay about?

I had to describe myself as a person who was either movable, immovable, or moving others. I chose “movable” and based my entire answer around a real life example. When I first came to America 5 years ago, I landed in New York City. It was extremely overwhelming. While outside on the streets and among the tallest buildings I had ever seen, I had to keep moving just to make sure I wasn’t crushed. In that moment, I realized that trying to get somewhere in life was just like trying to get somewhere in NYC. In both cases, no matter what, I had to keep moving.

What do you think the main take away or theme from your essay was?

I wrote my essay with the intention of showing my determination not just in one situation, but also on a more global scale. It was my best quality at that point, so naturally I had to write about it.

What did you learn through the college essay writing process, either about your topic, the process, or about yourself?

I definitely learned a lot about myself. I applied to over 20 colleges, so besides my main essay I had to write about 20 more. All the different topics and questions made me wonder, first of all, who I was as a person. In my high school – as, probably, in most high schools – achievement was determined by how well one could follow the template, not by how well one expressed oneself. Writing college essays provided me with an opportunity to do just that – express who I was.

What’s one thing you wish you knew before you submitted your college admissions essay?

Definitely proofreading. I cannot stress this enough. When I go back and re-read my essays now, I cannot believe I put “the” instead of “a,” or forgot a comma. It always happens, even if you think you’ve proofread it enough. I advise the students to write the essay early and proofread at various time intervals until it needs to be submitted. After a certain period of time, some sentences won’t seem as perfect as they did when you first put them down.

What tips would you offer students who are starting to try and figure out their essay topics?

No matter what you do, you will NOT know exactly what the university wants to see in your essay. There is just no way to know. So instead, focus on putting the real YOU into those essays. Include personal detail. Make sure the members of the admissions committee really have an idea of who you are as a person before they make the decision. Your GPA is just a number. Your ACT score is just a number. You are not defined by these numbers, and that is exactly what you need to show them.

If you’re looking for more college admissions essay writing help, stay tuned for more posts in the Tutor Talks series on college admissions essay writing — coming throughout this fall on the InstaEDU blog. And make sure to get in touch with Anastasiya K. and our nearly 2,000 college admissions tutors on InstaEDU for one-on-one college essay writing guidance. Be sure to follow us on Instagram @instaedu_tutoring and on Snapchat at ‘instaedu’ to unlock more Tutor Talks content.