A complete 14-day unit for Grade 8 The Number System, grounded in the Class Tile Mosaic Project scenario. Every lesson connects to the same authentic context, so students see how 8.NS skills work together instead of as disconnected topics.

Every lesson connects to the class designing a tile mosaic art piece - using rational tile measurements, recognizing repeating decimals as fractions, identifying irrational diagonals (root 2) and circle measurements (pi), estimating square roots for cutting tiles, comparing irrational lengths, and evaluating expressions with irrationals. Students see how 8.NS skills come together to plan a real art project. The 12th lesson and summative performance task bring it all together.

What’s included:

• 12 Lesson PDF Decks (10 slides each, with full speaker notes)
• 12 Editable PPTX Decks (drop in your own examples)
• 12 Print-Ready Worksheets + Answer Keys with misconception notes
• 12 Exit Tickets (3 questions, 5 minutes each)
• 4 Anchor Chart Posters (wall-ready, dark background, unique hero diagram per chart)
• Pre/Post Assessment (10 questions) + Answer Key
• Class Tile Mosaic Plan Summative Performance Task (5 parts, 16 points)
• Problem-Solving Rubric (4 criteria, 4 levels, 16 points)
• 14-Day Pacing Guide
• Family Letter (editable)

Lesson sequence:

• Lesson 1. Rational Numbers Review - 8.NS.A.1
• Lesson 2. Repeating Decimals to Fractions - 8.NS.A.1
• Lesson 3. Terminating vs Repeating Decimals - 8.NS.A.1
• Lesson 4. Introducing Irrational Numbers - 8.NS.A.1
• Lesson 5. Identifying Rational vs Irrational - 8.NS.A.1
• Lesson 6. Square Roots of Perfect Squares - 8.NS.A.2
• Lesson 7. Estimating Square Roots - 8.NS.A.2
• Lesson 8. Locating Irrationals on a Number Line - 8.NS.A.2
• Lesson 9. Comparing Irrational Numbers - 8.NS.A.2
• Lesson 10. Approximating Pi - 8.NS.A.2
• Lesson 11. Expressions with Irrationals - 8.NS.A.2
• Lesson 12. Class Tile Mosaic Synthesis - 8.NS (all)

Standards: 8.NS.A.1, 8.NS.A.2