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Mechanicsburg Area Senior High School

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Welcome to Mr. Costello's Webpage!

I teach in the LEARN class which is an Alternative Education setting at the Mechanicsburg Area Senior High School.   I am a very active member of our community and as teacher at MASH.  I am a volunteer firefighter with the Mechanicsburg Fire Company and as a teacher I am member of the SAP Team, The Code Blue Team, help with the Cats Cupboard, and I am a longtime football coach at MASH.  If you need any help, stop by MASH Room 25!! 


Any Questions / Concerns:  Please email me at [email protected] 


Time Off Mindset:

  • Accept that life will be very different over the next few weeks and make the best of your situation! 
  • Have a POSITIVE Mindset
  • Everyone is stressed so Make Good Choices 
  • Make life easier for others by helping others
    • help with chores, help with younger siblings, help around the house! 


School Work

MATH - Please continue to visit the link to the right to go to the website to continue working on your math activities.   Students know their login information!   

Social Studies -  Please use the links below or to the right to visit many websites to keep current on world news, to take virtual field trips to museums, and to learn some cool history! 

NEW ACTIVITY #2: You should have gotten an invite to join my google classroom on your school email account, but you can also use this link:

Class code