Measure in Units is a free printable Grade 2 maths worksheet on reading a length as a count of units, aligned to Common Core standard 2.MD.A.1. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two pupils in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.
2.MD.A.1
How many units long?
LessonPrint · 2.MD.A.1 · Set 1 · free to copy for classroom use
Set 1. Prints on its own sheet.
It practises reading a length as a count of units — 8 questions for Grade 2, all on Common Core 2.MD.A.1: Measure things with a ruler. The instruction to pupils is “How many units long?”, and the answer key follows on the next sheet.
CCSS.MATH.CONTENT.2.MD.A.1 — 2.MD.A.1, in the Measurement & Data domain for Grade 2. The published standard reads: “Measure the length of an object by selecting and using appropriate tools such as rulers, yardsticks, meter sticks, and measuring tapes.” The worksheet assesses that standard rather than a paraphrase of it.
Measure in Units is written for Grade 2, typically ages 7-8. It is one of the sheets on 2.MD.A.1, so it suits any pupil working at that standard — including older pupils revisiting it and younger ones working ahead.
Yes. All 8 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.
25 — one per pupil, 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.
Yes. Measure in Units, 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.
Yes — “Measuring with a Ruler” is a 45-minute Grade 2 plan for 2.MD.A.1, timed section by section, with the misconceptions to expect and an exit ticket. Measure in Units is the practice that follows it.
Measure things with a ruler.
Teaching this next? Measuring with a Ruler is the 45-minute plan for it, with the misconceptions to expect.
Last reviewed 2026-09-05. Aligned to 2.MD.A.1 of the Common Core State Standards for mathematics.