Plan Scale Drawing and Traffic Flow

Standards

Enduring understanding and essential question

Big idea: A floor plan is a promise that everything fits and everyone can move. If the plan is wrong, the room is wrong, and the furniture has already been bought.
Essential question: How do you prove a room works before anybody moves a single chair?

Objectives

By the end of this lesson, students will be able to:

1. (Low) Given the room dimensions on a client card, draw the room outline, doors, windows, and closet to scale on graph paper with the correct symbols and the scale written on the sheet.
2. (Mid) Place scaled furniture cut-outs to create the zones the client needs, then measure every path and check it against the rule (36 inches for a walker or wheelchair path, 30 inches everywhere else) and against balance, focal point, and proportion.
3. (High) Revise the plan after a peer review and justify in writing two changes made and one suggestion rejected.

Vocabulary

Tier 2 (general academic): scale, dimension, revise, justify, constraint
Tier 3 (FACS): floor plan, traffic flow (traffic path), zone, clearance, turning circle, elevation (previewed for Lesson 4.14), focal point (from Lesson 4.7). See Vocabulary 04.md for Turkish, Portuguese, and Spanish.

Materials and setup

• Handout 04.12 - Scale Plan Guide Traffic Flow Rules and Peer Review Checklist.md, one per student: page 1 the plan guide and furniture sizes, page 2 the furniture cut-out sheet at 1/2 inch = 1 foot, page 3 the traffic flow rules, page 4 the peer review checklist
• Quarter-inch graph paper, two sheets per student (Day 1) plus one spare; 11 by 17 graph paper for tiny house teams if available [Sal: if you have only letter size, tiny house teams draw at 1/4 inch = 1 foot]
• Rulers marked in quarter inches, one per student; pencils with erasers; scissors, one per pair; glue sticks or removable tape
• A 36-inch and a 30-inch strip of masking tape on the floor near the door, labeled, for students to walk through
• A tape measure for the demo
• The client cards from Lesson 4.11 (each student keeps theirs in the project folder)
• Slides: Slides 04.12 - Plan Scale Drawing and Traffic Flow (Day 1 and Day 2 marked)
• Setup notes: photocopy the cut-out sheet on card stock if you can; it survives moving around. Put the two tape strips on the floor before class. [Sal: a real walker or a borrowed wheelchair from the nurse's office, rolled through the 30-inch strip, makes the rule real in ten seconds.]

Pre-assessment

Yesterday's exit slips ("the one thing I am not sure how to fit") and the do-now stack from Lesson 4.10 onward. Skim the stack for scale errors (a 12-foot wall drawn as 12 squares at the wrong scale) before class; that tells you whether the Day 1 demo needs to go slower.

Do now and hook (Time: 5 min each day)

Day 1 do now (floor plan stack, day 6): On the board: "Here is a plan of a 12 by 14 room with the bed in the middle of the floor [draw it on the board or show slide 1]. Redraw it at 1/4 inch = 1 foot with the bed against a wall and a straight path from the door to the window." Two minutes to draw, one to compare with a neighbor.
Hook: walk through the 30-inch tape strip yourself, then carry a laundry basket through it, then ask a student to walk through with the borrowed walker. "Thirty inches is fine for you. It is not fine for Grandpa Okafor. Today every path in your plan gets measured."

Day 2 do now (floor plan stack, day 7): "Sketch a 6 by 9 foot entry with the front door on a short wall. Add a bench and a wall of hooks. Shade the walking path from the front door to the inside doorway. Is the path 36 inches? Write yes or no and how you know." Two minutes to draw, one to check.

Procedure

Day 1: the scale plan

Closure Day 1 (3 min): on a sticky note, "The first piece I placed was ___ because ___. The piece I could not fit is ___." Two read aloud. Stick the notes on the board under the client's name.

Day 2: traffic flow, principles, peer review, revise

Closure Day 2 (2 min): exit card, "One path in my plan is ___ inches wide, which passes because ___." Cards sorted by pass or fail on the math; a fail gets a two-minute check at the start of Lesson 4.13.

Questions to ask

Monitor understanding:

• How many squares is 36 inches at our project scale? At 1/4 inch = 1 foot?
• Show me the path from the door to the bed. Where is it narrowest?
• What is the focal point in your plan? What would a person see first from the door?

Deepen learning:

• Why does a bed need one open side? Who is that side for?
• Your peer suggested moving the desk under the window. What does the client gain and lose? (Light versus a desk that blocks the window from opening; a wheelchair user needs to reach the window latch.)
• In real construction, a plan like this is stamped by an architect before anyone builds. What is the architect's stamp promising?

Check for understanding

Day 1: circulate with a two-line clipboard check, "walls match the card" and "scale written." Day 2: the exit card is the check; a "got it" card gives a width in inches, the rule it is checked against, and a reason. A card that says "it passes because it looks big enough" is a "needs more."

Closure (Time: 3 min Day 1, 2 min Day 2)

Written above under each day.

Differentiation and supports

• ELL: the plan guide has a picture beside each rule (a walker with a 36-inch arrow, a bed with one side shaded open); the peer review checklist is yes or no boxes with a two-word label each, so a student can review without writing sentences; the words scale, path, clear, swing, and turn in Turkish, Portuguese, and Spanish on the handout margin (see Vocabulary 04.md); pair reviewers so at least one can read the checklist aloud.
• IEP and 504 (general): the room outline can be pre-drawn by the teacher for a student who needs it, with the student adding doors, windows, and furniture; pre-cut furniture pieces for a student who cannot use scissors; a larger scale (1 inch = 1 foot on 11 by 17) for a student with fine-motor or vision needs; extended time, the revision can finish in the first five minutes of Lesson 4.13.
• Grade 6 support: use the printed furniture cut-outs only (no drawing furniture by hand), measure three paths instead of every path, and skip the proportion line on the checklist.
• Grade 8 stretch: calculate the room's floor area in square feet and the floor area covered by furniture, then state the percentage open (a good bedroom is roughly 50 to 60 percent open floor [Sal: this is a rule of thumb, not a code line; say so]); tiny house teams draw the loft as a second small plan at the same scale.
• UDL checkpoint used: multiple means of action and expression (cut-outs moved by hand before anything is drawn; a student may also photograph the arrangement instead of tracing) and multiple means of representation (the tape strips on the floor, the borrowed walker, and the shaded path on paper all show the same rule).
• No-kitchen or no-machine alternative: not a lab; no alternative needed. If graph paper runs out, the plan guide's page 1 has a printable grid.

Assessment

Homework

None. Optional: at home, measure the narrowest path in your own bedroom (the gap between the bed and the wall, or the dresser and the door). Write it in inches. Would it pass the 30-inch rule?

Connections

Math: scale factors, unit conversion (feet to inches to squares), area in square feet, percent of area (grade 8 stretch). This is the same scale math the math teacher does with maps and similar figures; share the handout so the math teacher can use a floor plan as a problem. Technology or art: if the school has a free floor-plan web app, the Day 2 plan can be redrawn digitally as an extension [Sal: name the app the school allows].

Sources

• NYS Middle Level CTE FACS Content Module 04, Environmental Design and Management (nyctecenter.org, June 2018), lines 2. b) and 2. c). Copy in 02 Standards/NYS Module PDFs/.
• NYS Middle Level CTE Theme Module, Problem Solving and Innovation, line 2. a) sub-lines d., e., h. Same folder.
• NYS Learning Standards for Health, Physical Education, and Family and Consumer Sciences (1996), Standard 2, Intermediate. Wording per 02 Standards/STANDARDS SOURCES - web research.md, section 2. [Sal: confirm against the NYSED PDF.]
• National Standards for Family and Consumer Sciences Education 3.0 (LEAD FCS Education, 2018), competencies 11.4.3 and 11.4.4, per 02 Standards/STANDARDS SOURCES - web research.md, section 4.11.
• Clearances: 2010 ADA Standards for Accessible Design (ada.gov), section 403.5.1 (36-inch clear width) and 304.3 (60-inch turning space). The 30-inch general path and the furniture dimensions on the cut-out sheet are common residential planning figures, rounded to the nearest half foot for cutting.
• Sal's own materials: Lesson Dups/Unit_1_Interior_Design/education_teachingwork_floor_plan_frenzy_2026_04.docx (the floor plan idea used in Lesson 4.10; this lesson continues it at the project scale).

Teacher notes

• If Day 1 runs short, skip the zone circles and go straight to cut-outs; zones can be labeled on Day 2 after the paths are shaded. If Day 2 runs short, cut Step 4 and take the before-and-after at the start of Lesson 4.13.
• Common mistake: the door swing drawn the wrong way, into the hall. Interior doors on a bedroom swing into the room. Front doors usually swing in too. Say it during the demo.
• Common mistake: a path that is 36 inches at the door and 24 inches at the foot of the bed. The path is as wide as its narrowest point. Have students measure the pinch, not the entrance.
• Common mistake: measuring in squares and forgetting to convert. Six squares at project scale is 3 feet is 36 inches. Put the conversion line on the board and leave it there both days.
• The peer review is the same "mark, do not fix" routine from Lesson 1.19. Students know it; hold them to it.
• [Sal: keep a few finished plans from each class, with permission and no names, for next year's Day 1 demo.]