{"product_id":"area-perimeter-unit-squares-compound-shapes-math-unit-grades-3-5","title":"Area \u0026 Perimeter | Unit Squares, Formulas, Compound Shapes \u0026 Garden Problems | Math Unit | Grades 3–5","description":"\u003cp\u003e\u003cstrong\u003eArea \u0026amp; Perimeter\u003c\/strong\u003e is a complete measurement unit on area and perimeter: eight modules in a 27-page student book, plus a 16-page teacher edition with an eight-lesson sequence, model answers, assessment anchors, sources and an AI disclosure.\u003c\/p\u003e\n\u003cp\u003ePerimeter is the length around a shape; area is the space inside it, counted in unit squares. Students see both on the same rectangle before any formula appears, then learn why centimeters measure a fence and square centimeters measure a carpet, explain where A = a × b and P = 2a + 2b come from, discover that equal areas can have very different borders, split a compound shape, and solve a garden problem about the least border material.\u003c\/p\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e27-page student book with eight modules\u003c\/li\u003e\n\u003cli\u003eEvery module: explanation, worked example, guided practice and a transfer challenge\u003c\/li\u003e\n\u003cli\u003eA\/B\/C tasks: secure terms, apply and explain, transfer\u003c\/li\u003e\n\u003cli\u003eSentence starters and partner talk for supported entry\u003c\/li\u003e\n\u003cli\u003e16-page teacher edition: teaching rationale and an eight-lesson sequence with timings\u003c\/li\u003e\n\u003cli\u003eModel answer and assessment anchor (recall · apply · transfer) for every module\u003c\/li\u003e\n\u003cli\u003eSources and AI disclosure\u003c\/li\u003e\n\u003cli\u003ePrint-ready PDF (A4; prints on US Letter with fit-to-page)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eModule Sequence\u003c\/h2\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eBorder and interior\u003c\/strong\u003e — counting unit lengths and unit squares\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnderstand units\u003c\/strong\u003e — cm for length, cm² for area\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExplain the area formula\u003c\/strong\u003e — rows of unit squares and multiplication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExplain the perimeter formula\u003c\/strong\u003e — adding the sides of a rectangle\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSame area, different border\u003c\/strong\u003e — side pairs for a fixed area\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompound shape\u003c\/strong\u003e — splitting into rectangles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGarden problem\u003c\/strong\u003e — least border material for a given area\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDesign and check\u003c\/strong\u003e — designing a shape to given measurements\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch2\u003eStudents Will Learn To\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003edistinguish area from perimeter and use the correct units\u003c\/li\u003e\n\u003cli\u003eexplain and apply the area and perimeter formulas for rectangles\u003c\/li\u003e\n\u003cli\u003esolve problems with compound shapes and fixed areas\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePerfect For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eGrade 3–5 math\u003c\/li\u003e\n\u003cli\u003eMeasurement and geometry units\u003c\/li\u003e\n\u003cli\u003eKS2 maths\u003c\/li\u003e\n\u003cli\u003eMath centers and small-group reteaching\u003c\/li\u003e\n\u003cli\u003eHomeschool math\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhy Teachers Choose This Unit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eA complete sequence, not a set of loose worksheets\u003c\/li\u003e\n\u003cli\u003eEvery task has a written model answer\u003c\/li\u003e\n\u003cli\u003eDifferentiated so the whole class works on the same goal with different amounts of support\u003c\/li\u003e\n\u003cli\u003eIllustrations used as discussion prompts, with facts checked against the text or a real model\u003c\/li\u003e\n\u003cli\u003ePlan 8–12 lessons and teach straight from the PDF\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eCreated with AI assistance: ChatGPT (OpenAI) and Claude (Anthropic). All materials were reviewed and edited by a qualified teacher before publication.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWhich grade does this fit?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eIt suits Grades 3–5. In Common Core states it sits closest to the Grade 3 and Grade 4 measurement standards on area and perimeter. No official endorsement is claimed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre the units metric?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes, the tasks use centimeters and square centimeters. The reasoning carries over directly to inches and square inches.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does it take?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003ePlan eight to twelve lessons, or use the eight modules as stations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow is it delivered?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eAs an instant digital download after checkout. Nothing is shipped.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Teach Lessons","offers":[{"title":"Default Title","offer_id":58595093872984,"sku":null,"price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0882\/5667\/6184\/files\/10_Mathe_Flaeche_Umfang_EN_Thumbnail_A4.png?v=1790782658","url":"https:\/\/teachlessons.us\/products\/area-perimeter-unit-squares-compound-shapes-math-unit-grades-3-5","provider":"Teach Lessons","version":"1.0","type":"link"}