Skip to content
LessonPrint

Sort by Shape is a free printable Kindergarten math worksheet on classifying by a single attribute, aligned to Common Core standard K.MD.B.3. It prints 5 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 1 of 25 · the same problems every time you open this link.

Next setLesson plan

One paper per student

12345678910111213141516171819202122232425

All 25 sets ask different questions.

Sort by Shape

K.MD.B.3

NameDate

Sort each one into the right box.

1.Sort each one into the right box.

Sort: door, envelope, coin, ball

RoundStraight sides
2.Sort each one into the right box.

Sort: wheel, door, box, square

RoundStraight sides
3.Sort each one into the right box.

Sort: window, clock face, plate, box

RoundStraight sides
4.Sort each one into the right box.

Sort: box, book, circle, coin

RoundStraight sides
5.Sort each one into the right box.

Sort: plate, window, clock face, ball

RoundStraight sides

LessonPrint · K.MD.B.3 · Set 1 · free to copy for classroom use

Answer key — Sort by Shape

Set 1. Prints on its own sheet.

  1. 1.Round: coin, ball; Straight sides: door, envelope
  2. 2.Round: wheel; Straight sides: door, box, square
  3. 3.Round: clock face, plate; Straight sides: window, box
  4. 4.Round: circle, coin; Straight sides: box, book
  5. 5.Round: plate, clock face, ball; Straight sides: window

Questions about Sort by Shape

What does the Sort by Shape worksheet cover?

It practices classifying by a single attribute — 5 questions for Kindergarten, all on Common Core K.MD.B.3: Sort things into groups and count each group. The instruction to students is “Sort each one into the right box”, and the answer key follows on the next sheet.

Which Common Core standard does Sort by Shape practice?

CCSS.MATH.CONTENT.K.MD.B.3 — K.MD.B.3, under Measurement & Data for Kindergarten. The published standard reads: “Classify objects into given categories; count the numbers of objects in each category and sort the categories by count.” The worksheet assesses that standard rather than a paraphrase of it.

What age or grade is this worksheet for?

Sort by Shape is written for Kindergarten, typically ages 5-6. It is one of the sheets on K.MD.B.3, so it suits any student working at that standard — including older students revisiting it and younger ones working ahead.

Does Sort by Shape come with an answer key?

Yes. All 5 answers are generated from the same problems as the questions, so the key cannot drift out of step with the sheet. It starts on a fresh sheet of paper, after the questions, so it is not handed out with the class by accident.

How many different versions of Sort by Shape can I print?

25 — one per student, and all 25 ask different questions. Set 1 downloads the whole class as a single PDF. Every version is fixed to its own address, so a sheet printed today holds the same problems when you reopen it next week.

Is Sort by Shape free to print and photocopy?

Yes. Sort by Shape, its answer key and its 25 versions are free to print and photocopy for your own class, with no account, no email capture and no subscription at the download step. Please do not resell them or republish them as your own.

Is there a lesson plan to teach K.MD.B.3?

Yes — “Sorting into Groups and Counting” is a 30-minute Kindergarten plan for K.MD.B.3, timed section by section, with the misconceptions to expect and an exit ticket. Sort by Shape is the practice that follows it.

More practice for K.MD.B.3

Sort things into groups and count each group.

Teaching this next? Sorting into Groups and Counting is the 30-minute plan for it, with the misconceptions to expect.

All Kindergarten worksheets

Last reviewed 2026-09-05. Aligned to K.MD.B.3 of the Common Core State Standards for Mathematics.