ISRM Slide Rule Loaner Program
For Schools and Qualified Institutions

KEEP ISRM FREE!
Donations are
tax deductable
Previously, before COVID, we offered educators wishing to give students a hands-on experience and instruction with actual slide rules in order to introduce the importance of logarithms, the museum supplied quantities of 25 or more matching slide rules for temporary use, free of charge. We have since sold or gifted most of the loaner slide rules, so we can no longer offer matching sets. However, we can provide a mixed set of slide rules on loan or for sale to institutions and educators. Email the curator, Michael Konshak, and we'll tray to meet your needs.

Requests from individual teachers on school letterheads, (either by mail or electronically scanned) must be received before the slide rules will be shipped. However, for rush orders, an email with the school's website will suffice to verify that the contact is on staff. ISRM (or the associate members outside the USA) will pay for the shipping to the school and the teachers will be responsible for the return postage (in the USA Priority Mail Flat Rate box is currently $19 as of July 2024) and safe return of the slide rules. .

Contact curator: Mike Konshak
1944 Quail Circle
Louisville, CO 80027,
United States
+01 303-921-8709
or email:

Scroll down to see more pictures of students and schools on bottom of this page.


Professor Paul Guertin at Collège André-Grasset in Montreal, Canada uses slide rules provided by ISRM for his introductory calculus class to introduce logarithms to the students. Click on the banner for pictures.
Math teacher Sharon Hessney's class at Milton High School, Milton, MA. The students also created scales to make their own paper slide rules.


Cheryl Lewis, the Math Club Supervisor at Cowherd Middle School in Aurora, IL encouraged her students to learn about slide rules and at the end of the season they competed against each other in the ISRM International Slide Rule Championship (ISRC).

Dr. Barbara Rooker, Joplin, Missouri taught her K-12 math students about Logarithms.


Professor Joe Pasquale's Freshmen and Senior Slide Rule Seminars at University of California, San Diego (UCSD)


Kim Bjork of Mount Vernon Middle School instructs her math students on the use of slide rules (see photos below).


Dr. Cynthia Farthing PhD of the University Of Iowa, held a seminar titled "Uncovering the Hidden Figures: Women's Role in Mathematics and Science from World War II to Today". Inspired by the movie "Hidden Figures". ISRM is proud to help in such efforts.


Delta V Club uses ISRM slide rules to design rockets at
St. Vincent de Paul Elementary, Petaluma, CA


Slide rules, provided by ISRM are the focus of the weekly Math Tea attended by Students and Professors at Hood College, Frederick, MD


Scale Recomendations:
Elementary students need basic scales K, A, B, C, D
Geometry and pre algebra students also need S, T, ST, CI, CIF
Algebra II and Physics also need LL0, LL1, Ll2, LL3, DF, DI, etc.

Past and Current Participants:
Ouachita Hills Academy in Amity, AR
Harvard College in Arlington, MA,
Hawthorn Middle School North in Vernon Hills, IL
Frontier Regional School in Deerfield, MA
New York City College of Technology in Brooklyn, NY
Oasis Christian Academy in Winter Haven, FL
South Brooklyn Community High School in Brooklyn, NY
Covenant Classical School in Concord, NC
Northwestern Regional Juvenile Detention Center, Winchester, VA
Hood College in Frederick, MD
Chattanooga School for Arts and Sciences in Chattanooga, TN
Northwood High School in Silver Spring, MD (3 time user)
South Middle School in Joplin, MO
ETON Academy in Birmingham, MI
St. Vincent de Paul Elementary School in Petaluma, CA (3 time user)
Half Hollow Hills High School in Dixhills, NY
, Anderson High School in Cincinnati, OH
Westfield High School in Chantilly. VA
South Central Charter Essential School in Fitchburg, MA
Cowherd Middle School in Aurora, IL
South Winneshiek Comm. School in Calmar, IA (2 time user)
Thornton Township High School in Harvey, IL (2 time user)
Rhea County High School in Evansville, Tennesee
Murrah High School in Jackson, Mississippi
Ashland University in Ashland, Ohio
Life Christian Academy, Tacoma, Washington
Mountain Crest High School in Hyrum, Utah
Lincoln Village Regional Juvenile Detention Center in Elizabethtown, KY
Elgin Community College in Elgin, Illinois
St. Michael School in Orland Park, Illinois
Wilson High School in Florence, South Carolina
The Community of Jesus in Orleans, Massachusetes
Highland High school, Highland, Indiana
Governor's School for Science and Math, Hartsville, South Carolina
University of Oregon, Uegene, Oregon
Northern Virginia Comm. College, in Alexandria, Virginia
Western Carolina University, Cullowhee, North Carolina
Illinois Math and Science Academy, in Aurora, Illinois
Fairmont High School inKettering, Ohio
The Derryfield School in Manchester, New Hampshire
Hibriten High School in Lenoir, North Carolina
Oakland technical High School in Oakland, California
Mount Vernon Midddle School, Mount Vernon, Iowa
University of Iowa, Iowa City, Iowa
College Andre-Grasset, Montreal, Canada
University of Waterloo, Ontario, Canada;
University of Toronto, Ontario, Canada
HANSA Handelsschule in Reichenbach and Zwickau, Germany. (Fall 2009)

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Slide Rule Seminar

Use this downloadable Self-Study Course on your computer or as part of a classroom seminar. Ms. Leor Baldinger, Math teacher at Northwood HS in Sliver Spring, Maryland, found it very effective in helping her honor students to become proficient with slide rules and to improve their cognitive math skills. This is a 4 MB PDF version of the ISRM SR_Course web page.

Additional Resources
Instructions, Manuals, Scales and Construction

You can download additional instructions from the ISRM museum library or visit one of the following sites.

Click the banner below to see more pictures of Isaac Bumgardner's who wanted to introduce his advanced Calculus, Linear Algebra and Algebra (future engineering) students at Westfield High School (Chantilly, IL) to slide rules.:

Click the banner below to see more pictures of Ms. Baldinger's Northwood High School math students:

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Science teacher Dagmar Rutzen's class at Algonquin Middle School, Des Plaines, IL.

When faced with a new school year and the establishment of a new set of professional goals, Dagmar Rutzen, Algonquin Middle School science teacher, set a plan to incorporate her interest in math and slide rules into her science classes. Since science labs lend themselves to a lot of number crunching, Rutzen knew that the use of slide rules would strengthen her students' math skills. Any time measurements are taken during labs, the class will discuss significant digits and why the calculations are accurate only to a certain point. The class is involved in front-end estimation, so the answers are unknown. Learning to use a slide rule has also reinforced place value, estimation and significant digits. Rutzen has found that students are eager and willing to take chances to share answers in classes. Students who correctly find the answers are willing to help other students in the class.

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Kim Bjork's class at Mount Vernon Middle School, Mount Vernon, Iowa
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Norma Tanner's class at Hawthorn Middle School, Vernon Hills, Illinois
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Jim Hus's class at Highlands High School, Highland, Indiana
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Laurie Emery's class at South Winneshiek Community School, Calmar, Iowa

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Dr. William Priestley's class at Harry S. Truman High School, Levittown. Pennsylvania

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David (Randy) Sullivan's slide rule club at University of Oregon, Uegene, Oregon
John Butler's class at Murrah High School,
Jackson, Mississippi

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Dr. Justin Young's class at Ashland University, Ashland, Ohio

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Ouachita Hills Academy Pre-Calculus Class in Amity, Arkansas


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International Slide Rule Museum