**Rosenthal Prize**

for

**Innovation and Inspiration in Math Teaching**

for

### The 2021 Rosenthal Prize

for Innovation and Inspiration in Math Teaching

Designed to recognize and promote hands-on math teaching in upper elementary and middle school classrooms, the Rosenthal Prize carries a cash award of $25,000 for the single best activity, plus up to five additional monetary awards for other innovative activities. The winning teacher(s) will have the opportunity to share their innovative activities with educators around the world.

**The application window is now open. Visit **__rpz.momath.org__** for instructions, eligibility requirements, and an application form.**

**Applications are due by May 15, 2021**.

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### Congratulations to the 2020 Rosenthal Prize winners!

Congratulations to Doug O’Roark, winner of the 2020 Rosenthal Prize for Innovation and Inspiration in Math Teaching, for his lesson “Towers & Dragons.” In Doug’s lesson, students discover a stunning connection between paper folding and a classic disc-moving puzzle. Doug is the Executive Director of Math Circles of Chicago. He was awarded a $25,000 cash prize.

Additional congratulations to the 2020 runner-up, Lauren Siegel, the Director of MathHappens Foundation in Austin, TX, for her lesson “Engagement with Ratio and Proportion: Building a Tool to Deepen Understanding.” In Lauren’s lesson, students learn to appreciate ratios by making their own calipers and applying them to objects, photos, and geometric figures. Lauren was awarded a $5,000 cash prize.

*(Top from left to right) Douglas O’Roark (winner) and Lauren Siegel (runner-up)**(Bottom from left to right) Saul Rosenthal (Sponsor and MoMath Trustee) and Cindy Lawrence (MoMath Executive Director and CEO)*

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**Winning Lesson Plans from Previous Years**

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### 2019 Rosenthal Prize winners

Congratulations to Nat Banting, winner of the 2019 Rosenthal Prize for Innovation and Inspiration in Math Teaching, for his lesson “Dice Auction: Putting Outcomes of the Dice Up for Sale.” In Nat’s lesson, students test their intuitive probabilistic reasoning of dice throws with a dynamic “outcomes auction.” Reality — and mathematics — then provide feedback! Nat is a high school mathematics teacher and a university faculty member in Saskatoon, Saskatchewan, Canada. He was awarded a $25,000 cash prize.

Additional congratulations to the 2019 runner-up, Matt Roscoe, a mathematics professor at the University of Montana in Missoula, Montana, for his lesson “Building the City of Numbers: An Exploration of Unique Prime Factorization.” In Matt’s lesson, the prime factorizations of the counting numbers from 2 to 100 come to stunning, three-dimensional life. Matt was awarded a $15,000 cash prize.

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### 2018 Rosenthal Prize winners

Congratulations to Elizabeth Masslich, winner of the 2018 Rosenthal Prize for Innovation and Inspiration in Math Teaching for her lesson “Geometry Project: DARTBOARD.” In Elizabeth’s lesson, students learn geometric probability using shapes on a dartboard. Elizabeth is a teacher in the Milwaukee, Wisconsin metro area, and was awarded a $25,000 cash prize.

Additional congratulations to the 2018 first runner-up, Hector Rosario of the Atlanta, Georgia metro area, for his lesson “Squareland: Into How Many Squares Can You Cut a Square?” In Hector’s lesson, students generate and analyze patterns by cutting squares into smaller squares while making conjectures and trying to prove their claims. Hector was awarded a $5,000 cash prize.

The Museum also wishes to congratulate the 2018 runners-up, Dwaynea Golden of Hinesville, GA, and Kristen Rudd of Bergen County, NJ, who each received a $1,000 cash prize.

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### 2017 Rosenthal Prize winners

Congratulations to Matt Engle, winner of the 2017 Rosenthal Prize for Innovation and Inspiration in Math Teaching for his lesson “Bringing Similarity Into Light: Experiencing Similarity and Dilations Using Shadows.” In Matt’s lesson, students examine the shadows of shapes to explore concepts such as ratio, dilation, and proportionality in triangles. Matt is a teacher at Monterey Bay Academy in La Selva Beach, CA, and was awarded a $25,000 cash prize.

Additional congratulations to the 2017 second place winner, Heather Danforth-Clayson of Helios School in Sunnyvale, CA, for her lesson “Derangements and Random Rearrangements: An Exploration of Probability.” In Heather’s lesson, students explore rearrangements of number sets by conducting hands-on experiments in probability.

The Museum also wishes to congratulate the 2017 runners-up, Elisabeth Jaffe from Baruch College Campus High School in New York, NY, and David Poras from Weston Middle School in Weston, MA.

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### 2016 Rosenthal Prize winners

Congratulations to Traci Jackson, winner of the 2016 Rosenthal Prize for Innovation in Math Teaching for her lesson “Creating Color Combos: Visual Modeling of Proportional Relationships!” In Traci’s lesson, students explore proportional reasoning by mixing colored solutions, creating different color combinations to visualize ratios. Traci is a teacher at Oak Valley Middle School in San Diego, CA, and was awarded a $25,000 cash prize.

Additional congratulations to the 2016 second place winner, Dena Lordi of Diamond Bar High School in Diamond Bar, CA, for her lesson “Where Can I Find a Weightless Stick?” In Dena’s lesson, students trace the changing balance point on a scale as weights are added in order to identify the mean value of a set of numbers.

The Museum also wishes to congratulate the 2016 runners-up Crystal Frommert, Jemal Graham, and Maria Hernandez.

### Download Traci Jackson’s winning lesson plan,

“Creating Color Combos: Visual Modeling of Equivalent Ratios”

Download Dena Lordi’s second place lesson plan, “Where Can I Find A Weightless Stick”

Download Crystal Frommert’s runner-up lesson plan, “Algebra on a Number Line”

Download Maria Hernandez’s runner-up lesson plan, “Pass the Candy: A Recursion Activity”

Download Jemal Graham’s runner-up lesson plan, “Blacktop Coordinate Plane”

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### 2015 Rosenthal Prize winners

Congratulations to Jillian Young, winner of the 2015 Rosenthal Prize for Innovation in Math Teaching! Jillian created a lesson that helps students learn about surface area and volume using the game Minecraft. Jillian is a teacher at Elwood Kindle Elementary School in Pitman, NJ, and was awarded a $25,000 cash prize.

### Download Jillian Young’s winning lesson plan,

“MUTANT Creature Invasion: Minecraft Volume Investigation”

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### 2014 Rosenthal Prize Winner

Congratulations to Ralph Pantozzi, the winner of the 2014 Rosenthal Prize for Innovation in Math Teaching! Ralph, a teacher at Kent Place School in Summit, NJ, was awarded a $25,000 cash prize.

### Download Ralph Pantozzi’s winning lesson plan, “Random Walk”

**See a short video from “Random Walk” here**

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### 2013 Rosenthal Prize Winners

Congratulations to Trang Vu and Brent Ferguson, respectively the winner and runner-up of the 2013 Rosenthal Prize for Innovation in Math Teaching! Trang, a teacher at La Jolla High School in La Jolla, CA, was awarded a $25,000 cash prize, and Brent, a teacher at The Lawrenceville School in Lawrenceville, NJ, was awarded a $10,000 cash prize.

### Download Trang Vu’s winning lesson plan, “Mathematics and Fashion Design”

Download Brent Ferguson’s runner-up lesson plan, “Engineering a Number Line by Construction”

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### 2012 Rosenthal Prize Winners

Congratulations to Scott Goldthorp and Patrick Honner, respectively the winner and runner-up of the 2012 Rosenthal Prize for Innovation in Math Teaching! Scott, a teacher at Rosa International Middle School in Cherry Hill, NJ, was awarded a $25,000 cash prize, and Patrick, a teacher at Brooklyn Technical High School in Brooklyn, NY, was awarded a $10,000 cash prize.

### Download Scott Goldthorp’s winning lesson plan, “Hands-On Data Analysis”

Download Patrick Honner’s runner-up lesson plan, “Sphere Dressing”

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### About the Rosenthal Prize for Innovation and Inspiration in Math Teaching

The annual Rosenthal Prize for Innovation and Inspiration in Math Teaching is designed to recognize and promote hands-on math teaching in the upper elementary and middle school classrooms. Each year, the winning teacher is awarded a cash prize of $25,000, and the winning activity is shared with interested teachers around the world.

The Rosenthal Prize for Innovation and Inspiration in Math Teaching has four goals:

- To recognize and reward exceptional 4th through 12th grade teachers around the world who employ innovation(s) appropriate to the upper elementary or middle school classroom.
- To demonstrate to the education profession and the general public that innovative math teaching exists and can successfully reach the middle grades.
- To replicate the successful innovative activity of the winning teacher, distribute it to classrooms across the country, and positively impact math education in the United States and beyond.
- To encourage innovation and incorporation of hands-on methods in classrooms around the world.