The first "sentence" is a run on.
The third sentence needs additional punctuation or words.
How is my grammar and punctuation in the folowing paragraph?
Picture this, you are taking a test and the person next to you is chewing their gum loudly,so you can't concentrate. How disrespectful is that? The school board needs to make a rule no chewing gum in school.
3 answers
Picture this. You are taking a test and the person next to you is chewing their gum loudly. You can't concentrate. How disrepectful is that? The school board should have rules for no gum at school.
That is much better! :-)