Can you get troopers/police to monitor street where people speed near a school?

Yes. Call the police and report it. Tell the school to report it. Tell others to report it. Call your local Alderman, Mayor, Representative and report it. Call your local media or newspaper and report it. Report it on social media. It will probably help if you have a good descriptive story to go along with it. Like was the person or car dangerous looking? The more descriptive words or colorful the wording you use will get people more interested in the issue.

you can call 911 and report it and have troopers to stay near the school to report and stop speeders