2nd Grade Review | Math Mystery Worksheets | Back to School | Time Money Shapes

Ten detective cases cover a whole year of 2nd grade math, one topic per page — students solve each problem, write the answer in the box beside it, match it to a suspect, and cross suspects off until one is left standing. This no-prep, printable, self-checking Math Mystery is built for the first weeks back, and works just as well for spiral review, math centers, morning work, homework, early finishers, substitute/relief days and test prep. Because each page is a different topic, you can hand out one case a day or use the whole pack as a diagnostic.

Quick Details

Skill: Whole-year 2nd grade review, one topic per case · Grades: 2–3 · Format: 10 mysteries + full answer keys (printable PDF) · Theme: Back to school detective

The 10 Mysteries

The Number Line Job — The big number line has vanished from the math corner wall, and students solve addition and subtraction facts to find who took it down.

The Mixed-Up Mailboxes — Every mailbox in the office was swapped and renumbered, so students work out place value to put them right.

The Book Fair Bundle — Somebody changed every price sticker at the fair overnight.

The Field Day Files — The sports records are missing from the shed, and the graph holds the clues.

The Marble Jar Mystery — The science room jar was tipped out across the floor, and students count each set to find the culprit.

The Stopped Clock — Every clock in the hall shows a different wrong time, so students write the digital time on each face.

The Empty Cash Box — The school shop box was found empty, and students count each set of money.

The Shrinking Ribbon — Someone keeps cutting the art room ribbon shorter, and each length has to be measured and read.

The Block Corner Job — Every shape block was tipped out, and students count all the sides in each set.

The Pizza Party Puzzle — The party trays were cut into the wrong shares, so students work out the size of one share.

Why Teachers Love It

Zero prep — print and teach. The built-in answer keys make every case self-checking, so students get instant feedback and stay motivated. One topic per page means the pack works as a back-to-school diagnostic, a week of morning work, or ten separate centers — and the detective hook pulls in reluctant and struggling learners who would stall on a review worksheet.

Skills Covered

Addition and subtraction facts, place value and number names, money problems and counting coins, reading a graph, counting and skip counting sets, telling time on analog clocks, measuring length, the sides of 2D shapes, and equal shares — plus logical reasoning and deductive elimination as students rule suspects out clue by clue.

What's Included

Printable one-page mystery worksheets, one math topic on each, suspect line-ups, complete answer keys with the villain marked, and student instructions — all in one PDF.

Best Used For

Back to school review, beginning-of-year diagnostics, spiral review, math centers, morning work, homework, early finishers, substitute/relief days, and test prep for grades 2–3.

More From This Line

Browse every Math Mystery pack, or take the next step up with 3rd Grade Review and 4th Grade Review.