Why Spelling and Grammar Still Matter in High School

There is a common belief among high school students that spelling and grammar stop mattering once they are past primary school. The thinking goes: as long as the ideas are good, the markers will not care about a few spelling errors or a missing apostrophe.

This is wrong. Spelling and grammar affect marks across almost every subject in high school, and they affect them more than most students realise.

How It Affects Marks

In English, markers are explicitly assessing the quality of written expression. Poor grammar makes otherwise good analysis harder to follow. A sentence that is grammatically muddled forces the reader to re-read it, and in an exam with hundreds of papers to mark, that is not a good outcome for the student.

But it is not just English. History essays, Science reports, Geography extended responses, and even Maths explanations all require clear writing. Markers in these subjects may not be specifically grading grammar, but poor writing makes it harder for them to understand what the student is saying, and if they cannot follow the argument, they cannot give full marks.

Common Problems

The most frequent issues in high school writing are not exotic. They are basic. Run-on sentences. Comma splices. Incorrect use of apostrophes. Confusing "their" with "there" or "its" with "it's." Writing "would of" instead of "would have." These errors are distracting and suggest a lack of care even when the student has put genuine effort into the content.

Sentence structure is another problem. Many students write long, winding sentences that lose their point halfway through. Learning to write short, clear sentences is one of the most effective things a student can do to improve their marks across every subject.

Why Students Stop Caring

In primary school, spelling and grammar are taught explicitly. Students do spelling tests, grammar worksheets, and sentence correction exercises. In high school, it is mostly assumed that students already know the basics. There is less direct instruction and less correction.

Students take this as a signal that it no longer matters. In reality, it still matters. The school has just stopped teaching it because they expect students to have it sorted by now. Students who do not have it sorted fall further behind because no one is correcting them anymore.

What to Do About It

If your child has persistent spelling or grammar issues in high school, the fix is targeted practice, not more reading and hoping they pick it up. Identify the specific errors they make and work on those.

For grammar, online exercises that focus on sentence correction, punctuation, and sentence combining are useful. For spelling, a personal list of commonly misspelled words that the student reviews regularly is more effective than a generic spelling program.

Proof-reading is a skill that can be taught. Many students never read their own work back before submitting it. Teaching them to read their writing out loud, even quietly, catches most errors because the ear picks up what the eye misses.