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Handwashing Effectiveness Simulator

Run the Handwashing Effectiveness Simulator MicroSim Fullscreen

You can embed this MicroSim in your own course website with this iframe:

<iframe src="./main.html" width="100%" height="474px" scrolling="no"></iframe>

About this MicroSim

Handwashing Effectiveness Simulator is an interactive MicroSim for this health-education textbook.

Students apply correct handwashing technique parameters (duration, soap use, coverage) and observe how each factor affects a simplified germ-removal outcome.

Use the controls in the panel below the drawing to interact with the model, then talk through what changed and why. The MicroSim is width-responsive and can be embedded in any course page with the iframe shown above.

Bloom's Taxonomy level: Apply (L3) — demonstrate, calculate, apply

Lesson Plan

Audience

This MicroSim is designed for Grades 6-8. For the K-3 bands the teacher typically drives the activity on a shared screen; older students can explore the MicroSim independently.

Learning Objective

Students apply correct handwashing technique parameters (duration, soap use, coverage) and observe how each factor affects a simplified germ-removal outcome.

This activity targets Bloom's Apply (L3) (demonstrate, calculate, apply).

Suggested Use (about 10 minutes)

  1. Warm up (2 min). Ask students what they already know about the topic and let one volunteer describe what they see on the screen.
  2. Model it (3 min). Demonstrate the interaction once, thinking aloud so students hear the reasoning behind each choice.
  3. Guided practice (3 min). Invite students to try the interaction and to predict what will happen before they act.
  4. Discuss (2 min). Ask why the result came out the way it did, connecting the on-screen result back to the learning objective above.

Check for Understanding

Have each student (or pair) explain their result in one sentence, using the vocabulary from this chapter. Look for reasoning that matches the Apply-level objective rather than a lucky guess.

Specification

The full specification below was extracted from Chapter 6: Sleep, Fitness, and Emergency Response.

Type: microsim
**sim-id:** handwashing-effectiveness-simulator<br/>
**Library:** p5.js<br/>
**Status:** Specified

Bloom Taxonomy: Apply (L3)
Bloom Taxonomy Verb: demonstrate, calculate, apply

Learning objective: Students apply correct handwashing technique parameters (duration, soap use, coverage) and observe how each factor affects a simplified germ-removal outcome.

Canvas layout: Left side (450px) shows an illustrated pair of hands with a "germ count" indicator. Right side (150px) shows controls and a results readout.

Visual elements: Animated hand illustration showing germ dots decreasing as washing proceeds; a germ-count number; a technique score.

Interactive controls: Slider for wash duration (0-30 seconds); checkbox for "used soap"; checkbox for "scrubbed between fingers and under nails"; "Wash Hands" button to run the simulation; "Reset" button.

Default parameters: Duration starts at 5 seconds, soap unchecked, scrubbing unchecked — producing a low germ-removal result to motivate adjusting the parameters.

Behavior: Germ count drops most with duration ≥ 20 seconds AND soap checked AND scrubbing checked; missing any one factor substantially reduces effectiveness, shown numerically and visually.

Instructional Rationale: Applying correct technique parameters and observing the resulting outcome is an Apply-level task, so a parameter-adjustable simulation is used rather than a passive instructional list, letting students discover which factors matter most through experimentation.

Implementation notes: p5.js. Germ-removal calculation as a simple weighted function of the three parameters. Responsive canvas that reflows on window resize.

References