3rd Grade Emergency Sub Plans

Inside the case file

Emergency sub plans for 3rd grade, no prep Mini Mystery Detective pack of math worksheets, and a ready-to-go substitute review packet are all included in this print and go Mini Mystery Detective set for third grade. Ten one-page detective cases cover multiplication, division, addition and subtraction within 1,000, place value, rounding, telling time, area and perimeter, scaled picture graphs and fractions of a number, so a substitute can hand out a full math lesson at a moment's notice. Perfect for emergency sub plans, substitute folders, sub tubs, math centers, morning work, early finishers, homework and spiral review. Completely no prep - just print and go.

What's Inside

• Multiplication with equal groups and arrays: counting the rows and the columns, then multiplying
• Division and missing numbers: finding the number that is missing, whether it is the total or the size of a group
• Adding and subtracting within 1,000, with regrouping in every single problem
• Place value: the value of a digit, 10 and 100 more and less, and rounding to the nearest 10 and 100
• Two-step word problems: work out the rows or boxes first, then add or take away
• Telling time to the nearest minute and elapsed time: read the clock, then add the minutes
• Reading a scaled number line and counting along the marks to find an unlabelled value
• Scaled picture graphs with a key and half symbols, including how many more and how many altogether
• Area and perimeter on squared paper, with rectangles and L-shaped figures
• Finding a fraction of a number using a bar model

Ten detective cases to solve: The Art Room Trays, The Packed Bag Puzzle, The Paper Chase, The Smudged Register, The Field Trip File, The Bell Tower Case, The Whiteboard Line, The Library Loan List, The Playground Plan and The Shared Supplies. Answer keys included for every case, with the villain marked in red.

What is a Mystery Detective?

A no-prep detective activity where students solve math problems to cross off suspects and unmask the culprit. Every answer matches one suspect's number, so solving the page eliminates the suspects one by one and the last name standing is the villain. Skill practice plus critical thinking in one engaging, self-checking worksheet set.

Made for a Substitute

• No prep and no teacher input: print one page for each student and hand it out
• Every page teaches itself, so the adult in the room does not need to know the topic
• Each case is a different math topic and works on its own, so they can be used in any order
• About 25 to 35 minutes per page, with early finishers able to start a second case
• Answer keys follow the student pages, so marking takes moments

When to Use This Resource

• Emergency sub plans and substitute teacher folders
• Sub tubs and last-minute absence days
• Math centers and rotations
• Morning work and bell ringers
• Early finishers and I'm-done-now-what work
• Homework and independent practice
• Small group review and intervention
• Back to school and end of year spiral review

Grade Levels

Designed for 3rd grade. Also beneficial for 4th graders who need spiral review or a confidence-building start to the year, and for advanced 2nd graders ready for a challenge.

Why Teachers Love Mystery Detectives

• Zero prep - just print
• Self-checking: a wrong answer will not match a suspect, so students catch their own mistakes
• Highly engaging detective hook that keeps students working independently
• Real grade level rigor, not busy work: three-digit regrouping, genuine two-step problems and the full times table
• Ten different math topics in one download
• Answer keys for every page

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