Unit Feel Better Faster:
All about Flow Rate

Three images: Photo shows pills and a syringe on a counter. A photo shows an unhappy child with a thermometer in her mouth. A graphic shows a microscopic representation of blood, with rounded red and white floating shapes.
What is the quickest way to take medicine into your body so you feel better faster?
Copyright © 2004 Microsoft Corporation, One Microsoft Way, Redmond, WA 98052-6399 USA. All rights reserved.


All of us have felt sick at some point in our lives. Many times, we find ourselves asking, "What is the quickest way that I can start to feel better?" During this two-lesson unit, students study that question and determine which form of medicine delivery (pill, liquid, injection/shot) offers the fastest relief. This challenge question serves as a real-world context for learning all about flow rates. Students study how long various prescription methods take to introduce chemicals into our blood streams, as well as use flow rate to determine how increasing a person's heart rate can theoretically make medicines work more quickly. Students are introduced to engineering devices that simulate what occurs during the distribution of antibiotic cells in the body.

Engineering Connection

As the study of medicine moves into more macro- and micro-observations, viewing such occurrences taking place in the body, in real time, is almost impossible. So engineers who work in biomedical research develop devices that simulate the environment of a human body. These simulation devices enable thorough experimentation to record cell reactions over time for all sorts of medicines, vaccines and environmental changes. For example, medical investigators and engineers work together to determine how cancerous cells respond to various treatments and numerous types of cell movement. As another example, the interdisciplinary field of microfluidics develops miniaturized technologies that are able to manipulate the flow and reaction of tiny amounts of fluids. Doing this takes fewer materials and results in speedier testing and analysis, helping to advance innovations in biology and medicine. These applications require that engineers fully understand flow rates and human body physiology.

Unit Overview

This "legacy cycle" unit is structured with a contextually-based Challenge Question followed by a sequence of instruction in which students first offer initial predictions (Generate Ideas) and then gather information from multiple sources (Multiple Perspectives). This is followed by Research and Revise, as students integrate and extend their knowledge through a variety of learning activities. The cycle concludes with formative (Test Your Mettle) and summative (Go Public) assessments that lead students towards answering the Challenge Question. See the Teacher Outline and Schedule for the progression of the legacy cycle through the unit. Research and ideas behind this way of learning may be found in How People Learn, (Bransford, Brown & Cocking, National Academy Press, 2000); see the entire text at http://www.nap.edu/catalog.php?record_id=9853.

The "legacy cycle" is similar to the "engineering design process" in that they both involve identifying an existing societal need, combining science and math to develop solutions, and using the research conclusions to design a clear, conceived solution to the original challenge. Though the engineering design process and the legacy cycle depend on correct and accurate solutions, each focuses particularly on how the solution is devised and presented. See an overview of the steps of the engineering design process at http://www.nasa.gov/audience/foreducators/plantgrowth/reference/Eng_Design_5-12.html.

In lesson 1, students work through the Multiple Perspectives stage by developing, as a class, a list of information they need to acquire in order to answer the Challenge Question. During the Revise and Research phase, they are given scientific information about what occurs on the cellular level when a person is given antibiotics. During a teacher demonstration in an associated activity, students make observations as they observe different types of pills being dissolved, helping them to evaluate which chemical delivery method works the quickest.

In lesson 2, students continue in the Revise and Research stage to develop an understanding of how microfluidic devices are used, specifically in biological cell research. Once they have learned how to determine flow rate, students create their own microfluidic devices and test various flow rates. At the end, students complete the Go Public stage by determining that to reduce the time for medicine to get through a person's blood stream, a person should take the medicine by injection and increase his/her heart rate.

Educational Standards

Each TeachEngineering lesson or activity is correlated to one or more K-12 science, technology, engineering or math (STEM) educational standards.

All 100,000+ K-12 STEM standards covered in TeachEngineering are collected, maintained and packaged by the Achievement Standards Network (ASN), a project of D2L (www.achievementstandards.org).

In the ASN, standards are hierarchically structured: first by source; e.g., by state; within source by type; e.g., science or mathematics; within type by subtype, then by grade, etc.

See individual lessons and activities for standards alignment.


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Unit Schedule

See the Teacher Outline and Schedule for the suggested unit timeline, based on allotting a total of 180 minutes of class over two or more days.

Worksheets and Attachments

Visit [www.teachengineering.org/curricularunits/view/van_feelbetter_curricularunit] to print or download.

More Curriculum Like This

High School Lesson
Microfluidic Devices and Flow Rate

Students obtain a basic understanding of microfluidic devices, how they are developed and their uses in the medical field.

High School Lesson
How Antibiotics Work

Students are introduced to a challenge question. Towards answering the question, they generate ideas for what they need to know about medicines and how they move through our bodies, watch a few short videos to gain multiple perspectives, and then learn lecture material to obtain a basic understandin...


© 2013 by Regents of the University of Colorado; original © 2011 Vanderbilt University


Michelle Woods

Supporting Program

VU Bioengineering RET Program, School of Engineering, Vanderbilt University

Last modified: July 20, 2017

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