Determine the perimeter of a polygon or a missing side given the perimeter and other side lengths.
TEKS 3.7B bridges prior learning and next steps in Mathematics, keeping Perimeter coherent across the year.
In Mathematics, 3.7B defines what success looks like for Perimeter—from core skills to real‑world use.
Start with concrete or familiar examples, connect to prior knowledge, model a clear process, and provide checks for understanding aligned to 3.7B.
Standard 3.7B describes the essential skills and understandings for Perimeter in Grade 3. It clarifies the learning outcomes and what successful work looks like.
Use short exit tickets and tasks where students explain decisions, show multiple representations, or justify answers—directly aligned to 3.7B.
Students may rely on procedures without reasoning or mix key terms. Build in quick oral explanations, error analysis, and vocabulary supports tied to 3.7B.
