Explain strategies used to solve addition and subtraction problems up to 20 using words, objects, models, and number sentences.
With 1.3E, Grade 1 students practice Explain strategies (to 20) in multiple representations and contexts.
TEKS 1.3E bridges prior learning and next steps in Mathematics, keeping Explain strategies (to 20) coherent across the year.
Use short exit tickets and tasks where students explain decisions, show multiple representations, or justify answers—directly aligned to 1.3E.
It lays groundwork for the next grade by deepening accuracy and flexibility with Explain strategies (to 20), so students can tackle more complex problems later.
Students may rely on procedures without reasoning or mix key terms. Build in quick oral explanations, error analysis, and vocabulary supports tied to 1.3E.
Standard 1.3E describes the essential skills and understandings for Explain strategies (to 20) in Grade 1. It clarifies the learning outcomes and what successful work looks like.
