Measurement Mastery CFAMeasurement Masters Standard 2.MD.A.1 CFA Student: Date: Instructions: Read each question carefully. Show your thinking! Question 1 Which tool would be the best choice to measure the length of a small paperclip? A. 12-inch ruler B. 3-foot yardstick Question 2 How long is the pencil below in inches? 0 1 2 3 4 Pencil starts at 0. Answer: inches Question 3 Ms. Green wants to measure the width of the classroom door. Which tool would be the best choice? Why? Choice: 12-inch ruler 3-foot yardstick Explain your thinking: Question 4 Find the length of the key and the brush. Then, find the difference. KEY 0 1 2 Key: _______ inches BRUSH 0 1 2 3 Brush: _______ inches Show your work: The brush is inches longer than the key. Question 5 Leo has a broken ruler. It snaps at the 2-inch mark. One end of a string is at 2 and the other is at 7. 1. How long is the string? Explain how you know. 2. Mark the ruler and draw the string below: 2 3 4 5 6 7 Broken Edge © 2026 Measurement Mastery CFA Accuracy Counts
Measurement Mastery KeyAnswer Key Measurement Mastery CFA • Grade 2 • 2.MD.A.1 Teacher Guide 5 Questions • DOK 1-3 Question 1 DOK 1 Correct Answer: A. 12-inch ruler Standard alignment: Students identify that small objects like paperclips are best measured by a smaller tool (ruler) rather than a yardstick. Question 2 DOK 1 Correct Answer: 4 inches Standard alignment: Ability to read a tool accurately. The pencil aligns with the 4-inch tick mark. Question 3 DOK 2 Correct Answer: 3-foot yardstick Exemplar Reasoning: "A door is a large object. A yardstick is longer than a ruler, so it would be easier and faster to measure the door without having to move the tool as many times." Scoring Note: Accept any logic that references the tool's length in relation to the size of the door. Question 4 DOK 2 Key Length: 2 inches Brush Length: 3 inches Difference: 1 inch Standard alignment: Multi-step problem solving. Students must measure accurately and then compare using subtraction (3 - 2 = 1). Question 5 DOK 3 Correct Answer: 5 inches Strategy Exemplar: 1. 7 - 2 = 5 inches. 2. I counted the spaces between the 2 and the 7: 3, 4, 5, 6, 7. That is 5 jumps. Scoring Note: Students must provide both the answer and a valid explanation of how to handle the non-zero starting point. Measurement Mastery • Answer Key & Scoring Guide
Measurement Marathon CFA Version BMeasurement Marathon Standard 2.MD.A.1 CFA • Version B Student: Date: Goal: Show your measuring skills! Select the best tools and solve the measurement problems below. Checkpoint 1 Which tool is the best choice to measure the length of a ladybug? A. 12-inch ruler B. 3-foot yardstick Checkpoint 2 How long is the glue stick below in inches? 0 1 2 3 4 GLUE Answer: inches Checkpoint 3 A student wants to measure the length of a soccer field. Which tool would be the best choice? Why? 12-inch ruler 3-foot yardstick Explain your thinking: Checkpoint 4 Measure the marker and the eraser. Then, find the difference. MARKER 0 1 2 3 4 5 Marker: _______ inches Eraser 0 1 2 Eraser: _______ inches Show your subtraction: The marker is inches longer. Checkpoint 5 Maya has a broken ruler. One end is snapped off. She starts her measurement at the 4 and the other end is at the 10. 1. How long is the object she measured? Explain how you know. 2. Draw the object and markings on this ruler: 4 5 6 7 8 9 10 Broken Edge © 2026 Measurement Marathon • Version B Finish Line!
Measurement Marathon Version B KeyAnswer Key Measurement Marathon • Version B • 2.MD.A.1 Teacher Guide Form B Checkpoint 1 DOK 1 Correct Answer: A. 12-inch ruler A ladybug is a very small object. A ruler is the most appropriate and efficient tool for small, desk-sized items. Checkpoint 2 DOK 1 Correct Answer: 3 inches Students should observe that the glue stick starts at 0 and ends precisely at the 3-inch mark. Checkpoint 3 DOK 2 Correct Answer: 3-foot yardstick Exemplar Reasoning: "A soccer field is very long. Using a yardstick would be better because it is 3 feet long, so I won't have to move the tool as many times as a small ruler." Note: Students may also mention "measuring tape," but based on the two choices given, yardstick is the correct choice for efficiency. Checkpoint 4 DOK 2 Marker Length: 5 inches Eraser Length: 2 inches Difference: 3 inches Standard Alignment: 5 - 2 = 3. Students must measure both accurately and then perform the comparison subtraction. Checkpoint 5 DOK 3 Correct Answer: 6 inches Strategy Exemplar: 1. "I subtracted the start number from the end number: 10 - 4 = 6." 2. "I counted the jumps from 4 to 10: 5, 6, 7, 8, 9, 10. That is 6 inches." Understanding Check: Assesses if the student understands that measurement is the distance between two endpoints, regardless of starting at zero. © 2026 Measurement Marathon • Version B Key
