1.OA.C.6 Worksheet: Math Assessment — Grade 1 Aligned

This Grade 1 math assessment provides an evaluation of arithmetic and number sense. Students solve addition and subtraction problems within 20, identify number sequences, and apply logical reasoning to word problems. The outcome is a clear data point on student mastery of foundations required for Grade 2.

At a Glance

• Grade: 1 · Subject: Math
• Standard: CCSS.MATH.CONTENT.1.OA.C.6 — Add and subtract within 20 with fluency for addition and subtraction within 10
• Skill Focus: Addition, Subtraction, Multi-Step Word Problems, and Number Sense
• Format: 5 pages · 32 problems · Full answer key included · Printable PDF
• Best For: Comprehensive mid-semester summative assessment, diagnostic evaluation, or end-of-unit cumulative review
• Time: 45–60 minutes

This five-page mid-semester examination features a balanced mix of 32 tasks designed to test multiple sub-skills. The first section uses multiple-choice questions to assess number identification and basic doubling concepts. The second section focuses on computational fluency with horizontal math sentences and "One More/One Less" logic. Finally, the third section integrates literacy with a story-based analysis task and a high-order bonus challenge.

Mastery Evidence

The assessment architecture maps specific tasks to standard benchmarks. Section I provides evidence of number form recognition. Section II yields data on arithmetic fluency and number sequences. Section III assesses the transfer of knowledge to real-world contexts through reading. Educators can enter scores directly into gradebooks or IEP progress monitoring tools.

Standards Alignment

Primary alignment is CCSS.MATH.CONTENT.1.OA.C.6 (addition/subtraction within 20). The worksheet also supports CCSS.MATH.CONTENT.1.NBT.A.1 through number identification and patterns. These standard codes can be copied directly into lesson plans, IEP goals, or district curriculum mapping tools.

How to Use It

Administer this as a formal mid-semester exam to evaluate progress. For the word problem section, consider reading the story aloud to ensure reading level does not interfere with mathematical logic. Expected completion time is 50 minutes. This provides a clear snapshot of computational development during the term.

Who It's For

This resource is tailored for Grade 1 and Grade 2 students. The "One More" and "One Less" scaffolds support diverse learners. It is best paired with a physical number line or a hundreds chart for students requiring visual support during the summative assessment or end-of-unit review.

The CCSS.MATH.CONTENT.1.OA.C.6 standard represents a foundational shift from simple counting to strategic computational fluency. According to Fisher & Frey (2014), comprehensive summative assessments that combine rote arithmetic with conceptual application are essential for identifying the specific scaffolds students need to achieve mastery. This examination provides 32 distinct tasks that bridge the gap between abstract number identification and concrete problem-solving in context. Research from the NAEP suggests that early mastery of these number sense concepts is the strongest predictor of long-term success in higher-level algebra. By evaluating mental math and written computation, educators can generate a holistic view of performance that aligns with evidence-based practices. This resource ensures that data-driven instruction remains at the center of the first-grade math classroom.