Place Value: Word Form to Standard Form

Inside the case file

Word form to standard form place value worksheets for 2nd grade and 3rd grade: five Mystery Detective math cases, three digit numbers throughout. Print and go with full answer keys: no prep place value math activities for math centers, morning work, early finishers, homework and sub plans. Place value practice for 2nd grade and 3rd grade, reading three digit numbers in word form and writing them in standard form, set around school so it fits any week of the place value unit. It works as a math center, morning work or place value review, and a CSI Mini Mystery Detective marks itself.

Reading three digit numbers written out in words is taught once and then assumed, and this is the practice that keeps it honest, because students see straight away whether they read each hundred, ten and one correctly. One case fits a morning work slot, so the five cover a week of the place value unit, and each CSI Mini Mystery Detective math page is self-marking.

The Cases

1. Box of Chocolates - a box on the desk, unsigned
2. Missing Toy - a classmate's toy has gone
3. Caught Being Good - somebody doing the right thing
4. The Missing Teacher - a teacher nowhere in school
5. The Teachers Lunch - the staffroom lunch has vanished

What's Inside

• Five case files, each a page of word form to standard form conversions
• Sixteen numbers per case, all of them three digits
• Clue lists beside the questions, so one answer removes one clue
• A black and white copy of all five cases for everyday printing
• An answer key for every case
• Print and go: no cutting, no laminating, nothing to prepare

What Is a CSI Mini Mystery Detective?

A CSI Mini Mystery Detective is one printed page with a crime on it and short clue lists beside the questions. Every clue carries a number, the answers on the page produce those numbers, and a match strikes that clue out. The clues left at the end are the solution. Nothing is cut, laminated or charged, and reading the number correctly is the only way through.

When to Use This Resource

This is the set for the place value unit, in the week after word form has been introduced and students are still sounding numbers out. It is also worth a run before testing, because word form questions appear on papers long after the unit has finished and they are easy marks to drop. All the instructions are on the page, so it goes into a sub folder as it is.

Use it for morning work, math centers, early finishers, homework, test prep, sub plans and homeschool lessons, with a whole class, a small group or one student.

Grade Levels

Written for 2nd grade and 3rd grade. Second graders use these inside the place value unit, and third graders use them as a quick check that word form stuck over the summer.

Why Teachers Love These Cases

• A misread number matches no clue, so students go back and look
• No preparation of any kind beyond printing
• Five cases makes a week of place value warm ups
• Suits a whole class, a small group, partners or one student

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