St. Patrick's Day Addition & Subtraction CSI Mystery Worksheets

Inside the case file

St Patricks Day addition and subtraction CSI math worksheets for March, wrapped in a CSI Mystery Detective case your class will want to finish. The Hidden Pot of Gold mystery sends 2nd grade and 3rd grade students inside a leprechaun's hideout, where every correct sum within 100 rules one suspect out of the line-up and the last name standing is the culprit. It is fun math practice with a reason to be accurate, timed for the week of the 17th. Students read a map through a letter key, add along a trail of gold pots, check worked answers for errors and color the right shamrock forward. Color and black-and-white pages plus answer keys, nothing to cut.

The Case: The Hidden Pot of Gold

St Patricks Day falls on the 17th of March, and the stories that come with it are older than anyone can trace. A leprechaun is a small, sharp, well-dressed fairy from Irish folklore, and it keeps its gold somewhere nobody has ever found. Your students have got closer than anyone: they are inside, and there is one route through to the pot that the math will give them.

What's Inside

• Reading letters off a map with a key to decode the first direction
• Addition along a trail of pots of gold, with the running total settling the clue
• Checking worked answers for errors and tallying which are correct
• Addition problems used to color the correct shamrock and arrow forward
• Addition decoded through a letter key to find the final room
• Full color and black-and-white versions of every page
• Answer keys for the whole case

What Is a CSI Mystery Detective Case?

Deduction on paper, powered by math - that is a CSI Mystery Detective case. Your class gets a crime and a line-up, the math worksheets supply the evidence, and every correct answer removes one suspect until a single name is left. It is a math escape room without the locks, the login or the prep. The advantage over a practice page is that the arithmetic has to hold or the case will not close. Use it as a whole math activity, in math centers, or as detective activities for early finishers.

When to Use This Resource

• St Patricks Day in March, when a normal worksheet will not hold them
• Addition and subtraction review before or after a unit test
• Math centers, early finishers and independent work
• Emergency sub plans that run themselves
• End of year review, when attention is thin and the work still has to happen

Grade Levels

Built for 2nd grade and 3rd grade. Second graders run it comfortably with a little support on the trail page; third graders finish inside a lesson. It also suits 4th grade students who need addition and subtraction review in a form that does not look like going back a year.

Why Teachers Love CSI Mystery Detective Cases

• Zero prep - print and hand out
• Self-checking by design, because a wrong answer breaks the deduction
• A St Patricks Day activity that still does real math
• Works as a whole lesson, a center, or a filler for an awkward afternoon

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