Core Skills Analysis
Mathematics
- Shalee measured each piece of wood using a ruler, practicing unit conversion between inches and centimeters (CCSS.MATH.CONTENT.7.NS.A.1).
- She added the lengths of multiple boards to calculate total material needed, reinforcing addition of decimals and estimation (CCSS.MATH.CONTENT.7.NBT.B.4).
- She applied geometry by identifying right angles for the chair legs and using a protractor to confirm 90‑degree joints (CCSS.MATH.CONTENT.7.G.B.5).
- She calculated the potential weight each leg could support by multiplying load per leg by four, linking multiplication to real‑world engineering (CCSS.MATH.CONTENT.7.EE.B.3).
Science
- Shalee examined the wood’s grain and hardness, learning why certain species are stronger for furniture (NGSS MS-PS2-2).
- She tested chair stability by gently applying pressure, observing forces, balance, and center of mass (NGSS MS-PS2-1).
- She considered human ergonomics, matching chair height to average knee‑to‑floor measurements for a 12‑year‑old (NGSS MS-LS1-2).
- She observed how energy is transferred from her hands to tools (saw, drill) and how that energy cuts or joins wood (NGSS MS-PS3-4).
Language Arts
- Shalee read a step‑by‑step instruction sheet, extracting key actions and sequencing them correctly (CCSS.ELA-LITERACY.RI.7.1).
- She wrote a brief reflective paragraph describing the building process, using transition words and technical vocabulary (CCSS.ELA-LITERACY.W.7.2).
- She explained the project aloud, accurately using terms like "joint," "torque," and "load distribution" (CCSS.ELA-LITERACY.SL.7.4).
- She organized the building steps into a numbered list, reinforcing logical ordering and clarity (CCSS.ELA-LITERACY.W.7.4).
Technology & Engineering
- Shalee selected appropriate hand tools (saw, drill, screwdriver) and demonstrated safe handling procedures (ISTE Standards for Students 4).
- She followed an engineering design cycle: planning, building, testing stability, and revising leg length (NGSS MS-ETS1-1).
- She identified a problem when one leg was slightly shorter, then adjusted the screw depth, illustrating iterative problem‑solving (NGSS MS-ETS1-2).
- She learned basic joinery concepts—using screws and dowels to distribute load evenly across joints (NGSS MS-ETS1-2).
Art & Design
- Shalee chose a simple modern silhouette for the chair, considering proportion and visual balance (National Core Arts Standards 7.1a).
- She selected a natural finish that would highlight the wood grain, linking material choice to aesthetic appeal (7.2b).
- She sketched a quick perspective drawing of the completed chair in a dining room setting, developing spatial reasoning (7.1b).
- She evaluated how the chair’s height and style would complement other furniture, practicing design critique (7.2a).
Tips
To deepen Shalee’s learning, have her create a scaled blueprint of the chair on graph paper before cutting any wood, then compare the blueprint to the finished piece to discuss accuracy. Next, set up a simple load‑test using books to measure how many pounds each leg can hold before bending, turning the test into a data‑collection experiment. Encourage her to write a how‑to blog post or video tutorial that explains each step and the science behind it, reinforcing both technical writing and presentation skills. Finally, invite her to redesign the chair for a different purpose—like a desk or a bench—so she can apply the same measurements, forces, and aesthetic decisions to a new context.
Book Recommendations
- The Most Magnificent Thing by Ashley Spires: A story about perseverance in building a project, inspiring young makers to iterate and problem‑solve.
- Rosie Revere, Engineer by Andrea Beaty: Follows a young girl's inventive spirit, showing how failure leads to better designs—perfect for a budding chair builder.
- The Way Things Work Now by David Macaulay: Explains the physics behind everyday objects, including forces, joints, and materials, connecting directly to Shalee’s chair project.
Learning Standards
- CCSS.MATH.CONTENT.7.NS.A.1 – Apply and extend previous understandings of operations with fractions to add, subtract, multiply, and divide rational numbers.
- CCSS.MATH.CONTENT.7.G.B.5 – Solve real‑world and mathematical problems involving area and volume of composite shapes.
- CCSS.ELA-LITERACY.RI.7.1 – Cite specific textual evidence to support analysis of primary and secondary sources.
- CCSS.ELA-LITERACY.W.7.2 – Write informative/explanatory texts to examine a topic and convey ideas clearly.
- NGSS MS-PS2-1 – Apply Newton’s Second Law to design a simple test of force and motion.
- NGSS MS-PS2-2 – Plan and conduct an investigation to demonstrate the effects of balanced and unbalanced forces.
- NGSS MS-ETS1-1 – Define the problem, identify criteria, and constraints for a design solution.
- NGSS MS-ETS1-2 – Evaluate solutions to a problem based on criteria.
- ISTE Standards for Students 4 – Innovative Designer – Use a variety of technologies within a design process to identify and solve problems.
Try This Next
- Worksheet: Convert the measured wood lengths from inches to centimeters and calculate total material cost.
- Quiz: Identify which force (gravity, tension, compression) is acting on each part of the chair during use.