Math worksheets & activities, pre-K to high school
Self-checking detective worksheets, CSI cases, escape rooms and game shows for every grade. Students solve each problem, match the answer to a suspect and cross suspects off until one is left.
Winter Addition Within 20 Escape RoomDigital escape room · Grades K–2See the case file →
Early Multiplication Arrays MysteryMystery worksheets · Grades K–4See the case file →
Christmas Counting to 20 Escape RoomDigital escape room · Grades K–1See the case file →
100th Day Missing Numbers to 100 MysteryMystery worksheets · Grades K–2See the case file →
Winter Subtraction Within 20 Escape RoomDigital escape room · Grades K–2See the case file →
Telling Time to 15 Minutes MysteryMystery worksheets · Grades K–4See the case file →
Easter Counting Within 10Color by code · Grades K–1See the case file →
Earth Day Number After to 100Color by code · Grades K–2See the case file →
Time to the Hour & Half Hour MysteryMystery worksheets · Grades K–4See the case file →
Easter Counting Within 20Color by code · Grades K–1See the case file →
Hundreds Chart Missing Numbers MysteryMystery worksheets · Grades K–3See the case file →
Summer Counting to 20 Escape RoomDigital escape room · Grades K–1See the case file →Math
Grades 1–2
Addition and subtraction3-digit addition with regrouping2-digit addition with regroupingAddition and subtraction within 100Number order
Christmas 2-Digit Add & SubtractDigital escape room · Grades 2–4See the case file →
2-Digit Addition MysteryMystery worksheets · Grades 1–4See the case file →
2-Digit Addition No Regrouping MysteryMystery worksheets · Grades 1–3See the case file →
2-Digit Subtraction MysteryMystery worksheets · Grades 1–4See the case file →
2D Shapes Escape RoomDigital escape room · Grades 2–4See the case file →
3-Digit Add & Subtract: Haunted HallwayCSI mystery · Grades 2–5See the case file →
3-Digit Addition MysteryMystery worksheets · Grades 2–5See the case file →
3-Digit Subtraction MysteryMystery worksheets · Grades 2–5See the case file →
Valentine's Day 3D Shape AttributesDigital escape room · Grades 2–4See the case file →
Halloween 4-Digit Add & Subtract MysteryMystery worksheets · Grades 2–5See the case file →
4-Digit Addition MysteryMystery worksheets · Grades 2–5See the case file →
4-Digit Subtraction MysteryMystery worksheets · Grades 2–5See the case file →Math
Grades 3–5
Addition and subtractionOrder of operationsMultiplication and divisionMulti-digit multiplication3-digit addition with regrouping
Christmas 2-Digit Add & SubtractDigital escape room · Grades 2–4See the case file →2-Digit Addition MysteryMystery worksheets · Grades 1–4See the case file →2-Digit Addition No Regrouping MysteryMystery worksheets · Grades 1–3See the case file →2-Digit Subtraction MysteryMystery worksheets · Grades 1–4See the case file →2D Shapes Escape RoomDigital escape room · Grades 2–4See the case file →3-Digit Add & Subtract: Haunted HallwayCSI mystery · Grades 2–5See the case file →3-Digit Addition MysteryMystery worksheets · Grades 2–5See the case file →3-Digit Subtraction MysteryMystery worksheets · Grades 2–5See the case file →Valentine's Day 3D Shape AttributesDigital escape room · Grades 2–4See the case file →Halloween 4-Digit Add & Subtract MysteryMystery worksheets · Grades 2–5See the case file →4-Digit Addition MysteryMystery worksheets · Grades 2–5See the case file →4-Digit Subtraction MysteryMystery worksheets · Grades 2–5See the case file →Math
Grades 6–8
Order of operationsMultiplication and divisionDecimalsMulti-digit multiplicationOne-step equations
Christmas 4-Digit Subtraction MysteryMystery worksheets · Grades 3–6See the case file →
Add & Subtract Unlike FractionsDigital escape room · Grades 4–6See the case file →
Add & Subtract CSI Mystery: Dragon EggsCSI mystery · Grades 3–6See the case file →
Complementary & Supplementary AnglesDigital escape room · Grades 6–8See the case file →
Area of Composite Figures MysteryMystery worksheets · Grades 4–6See the case file →
Area & Perimeter CSI MysteryCSI mystery · Grades 3–6See the case file →
Area Model: 2-Digit by 1-Digit MysteryMystery worksheets · Grades 3–6See the case file →
Box Method 2x2 Multiplication MysteryMystery worksheets · Grades 4–6See the case file →
Circumference & Area of a CircleDigital escape room · Grades 6–8See the case file →
Shapes, Triangles & Angles CSI MysteryCSI mystery · Grades 4–6See the case file →
Combining Like Terms Escape RoomDigital escape room · Grades 6–8See the case file →
Four-Quadrant Ordered Pairs MysteryMystery worksheets · Grades 5–7See the case file →Math
High school
IntegersMulti-step equationsQuadratic equationsAngle relationshipsSlope
Parallel Lines & TransversalsDigital escape room · Grades 7–9See the case file →
Distributive Property & Like TermsDigital escape room · Grades 7–9See the case file →
Two-Step & Multi-Step InequalitiesMystery worksheets · Grades 7–9See the case file →
Add & Subtract Integers: Monster MummyCSI mystery · Grades 5–9See the case file →
Add & Subtract Matrices Escape RoomDigital escape room · Grades 9–10See the case file →
Multi-Step Equations with ParenthesesMystery worksheets · Grades 7–10See the case file →
Add & Subtract Polynomials Escape RoomDigital escape room · Grades 6–12See the case file →
Pythagorean Theorem MysteryMystery worksheets · Grades 7–9See the case file →
Quadratic Equations by Factoring MysteryMystery worksheets · Grades 8–10See the case file →
Finding Slope MysteryMystery worksheets · Grades 7–9See the case file →
Systems of Linear Equations MysteryMystery worksheets · Grades 8–9See the case file →
Right Triangle Trigonometry MysteryMystery worksheets · Grades 9–11See the case file →Showing a mix from each grade band. Every math pack is listed on its grade page, by standard.
Questions teachers ask
Math FAQ
What math topics do you cover?
Every Common Core domain from counting and addition in kindergarten to multi-digit multiplication, fractions and decimals in grades 3–5, ratios, integers and equations in middle school, and algebra and geometry in high school.
How do the detective worksheets check themselves?
Each correct answer matches one suspect's badge number. A wrong answer matches nobody, so students know to go back and recheck without asking the teacher.
Are they printable or digital?
Most packs are printable PDFs with full answer keys. The digital escape rooms and game shows run in a browser, which suits a 1:1 device day.