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Biographies of President-Elect Candidates

ViCKI Hamdorf

I am currently retired from public education after 35 years as a mathematics teacher. I am now a Curriculum Director for Iowa Center of Interdisciplinary Training & Basketball Data Analytics Battle Contest (BDAB) Assistant and a Certified Health Coach. I earned a B.A. in Mathematics and Secondary Education from Coe College in Cedar Rapids in 1984.

My career began at North Scott High School teaching high school mathematics. When I started my family, I took a part-time position at Oxford Junction to be closer to home. When they started sharing, I changed to teaching middle school mathematics at Olin-Oxford Junction. A merger moved me to Midland Middle School. Then I became a director of the Little Home DayCare. Then I began at North Cedar High School, the district I graduated from. I remained there teaching high school for 11 years and moving to middle school for the last 3. I retired to be a caretaker for my parents and husband. I am currently a caretaker and a curriculum director with the Iowa Center of Interdisciplinary Training. I also travel around Iowa promoting the BDAB Competition at high schools.

Professional Memberships: ICTM, NCTM, ISEA, IA AMTE

Leadership Experiences in Math Ed: Model Teacher at North Cedar, ICTM Board Member, Grant recipient for ICTM, Grant recipient for NCTM, TI-nSpire trainer for Texas Instruments. First Tech Challenge Robotics Coach. Organized the 90 degree Mathematics Club at North Cedar. Helped with Math Modeling summer workshops at Simpson College. PowerTeaching Mathematics Step-up STEM grant recipient. Coached teams each year in the High School Co-Map Math Modeling (HiMCM) National competition from 2006-2016.

Speaker at NCTM Regional in Philadelphia, Speaker at ICTM Conference 1994-2019. Presented at the Sports Analytics Conference at Central College. Presented at the Great Lakes Region Data Analytics Conference. Published articles in the ICTM journal.

Angie Shindelar

My husband, Jim, and I live in Greenfield southwest of Des Moines. We have two adult children, Whitney and Dillon, who have both recently started their own families. We are thrilled to be grandparents of Roland (14 mo) and Aurora (3 mo).

I currently teach 6th grade math at Harding Middle School in Des Moines. This is my first year back in the classroom after working in math leadership roles for Des Moines Public Schools and Green Hills AEA for the last ten years. Previously I taught 7th and 8th grade math at Nodaway Valley CSD in Greenfield for 15 years and 3rd grade for 7 years.

My education background includes a BA in Elementary Education from UNI, a MA in Middle Grades Mathematics Teaching also from UNI, and a MA in Educational Leadership from Iowa State.

I am a member of ICTM, NCTM, NCSM, and ISEA/NEA. I have most recently joined TODOS in my efforts to learn and better understand how I can support and be a more effective teacher for marginalized student groups

Highlights of my work as a math educator include: receiving the 2001 National Science Foundation Presidential for Excellence in Mathematics Teaching Award; being a part of a teacher action research group through Iowa State University that focused on promoting purposeful discourse in math. To summarize my experience and learning I wrote a chapter titled: Maintaining Mathematical Momentum Through Talk Moves. In Promoting purposeful discourse: Teacher research in mathematics classrooms. (2009) Herbel-Eisenmann, B., & Cirillo, M. (Eds.). NCTM: Reston, VA.; and becoming a professional learning facilitator for Illustrative Mathematics. I am currently working with the K-5 Beta Pilot Team. I am also a facilitator for 6-8.

In addition, I have presented at ICTM, NCTM, and NCSM conferences as well as facilitated professional learning around effective teaching practices and the Iowa Core Math Standards.

I have enjoyed my current position as Vice-President of Elementary on the ICTM Board. I have met and worked with many wonderful people from across the state. The Board is an energetic and passionate group of math educators that are excited to continue ICTM’s legacy of excellence and seek ways to improve the organization. I would be honored to serve as the President.

Biographies of Vice-President Elementary Candidates

Kristin Kanaskie Grotewold

Kristin Kanaskie Grotewold currently serves as the K-5 Math Coach for the Waukee Community School District, part of Heartland AEA. As the District’s first math coach, she has helped facilitate a new curricular resource adoption as well as supported a new math intervention program and interventionists. Her passion lies in working with students by modeling instructional strategies for teachers and helping them develop targeted interventions for students who may need additional support or challenge. She has helped facilitate both K-5 and 6-12 Math Curriculum work across the district and helped plan and lead math professional development across all nine elementary schools.

Before serving as the district’s first Math Coach, Kristin was an Instructional Coach at Woodland Hills Elementary (K-5) for three years. Kristin also served as an Instructional Mentor for two years where she supported first year teachers in grades K-12 modeling instructional strategies and supporting teacher growth. Prior to these leadership roles, Kristin taught 7th grade mathematics and 4th grade in the Waukee Community School District.

Kristin graduated from the University of Northern Iowa in 2007 with Elementary and Middle Level Education majors, along with K-8 Math and Social Studies minors. While attending UNI, Kristin co-started a student organization, TEAM - Teaching Educators About Mathematics. This organization provided instructional strategies and reasoning for education majors around teaching elementary math and provided service opportunities such as a math fair for local elementary schools. TEAM was an ICTM and NCTM affiliation and Kristin was able to travel to the NCTM Annual Conference in Atlanta to be recognized by NCTM President Skip Fennell at the time. She began her teaching career at Minburn Elementary in the Adel DeSoto Minburn School district where she taught 4th grade and 5th grade. After a few years of teaching, she obtained her 6-12 Mathematics Endorsement, Masters Degree in Education, and PK-12 Administrator Licensure.

She is currently a member of the Iowa Council of Teachers of Mathematics (ICTM), the National Council of Teachers of Mathematics (NCTM), and the National Council of Supervisors of Mathematics (NCSM). Kristin has attended numerous NCSM, ICTM, and NCTM conferences and seminars. She has been an annual speaker at the ICTM Conference around Math Interventions, Understanding Problem Solving, Standards-Based Reporting, Hands-on Authentic Real World Math Tasks, and Fact Fluency. Kristin also had the opportunity to speak at the 2010 NCTM Regional Conference in New Orleans on Problem Solving. Kristin has written for the ICTM Journal on incorporating problem solving into the elementary math classroom. She looks forward to an opportunity to lead math educators and leaders from around the state to best support our teachers and students.

Ann Johnson

AEA that you live or work in: Grantwood AEA (Iowa City Schools)

Current Job Position: 3rd Grade Teacher, Borlaug Elementary, Iowa City School District

Previous Job Experiences:

      • Taught 1st, 2nd and 3rd Grade in the Lake Forest School District (Lake Forest, IL 2000-2006)
      • Taught 1st and 2nd Grade in the Dubuque Community Schools (2006-2020)
      • Math Initiative Leader for the Dubuque Schools responsible for helping plan and deliver math professional development for all elementary teachers (2014-2020)
      • Math Content Leader for the Dubuque Schools responsible for helping plan and deliver professional development at the building level. (2014-2020)


      • B.A. Elementary Education- University of Iowa (1996-2000)
      • M.A. Literacy- Northeastern Illinois University (2002-2005)

Professional Memberships: NCTM, ICTM, International Literacy Association (ILA), Build Math Minds, NBCT

Leadership Experiences in Mathematics education:

      • Teacher Leader in planning and delivering math professional development to elementary teachers in the Dubuque Schools
      • Mentor for Iowa applicants seeking the Presidential Award for Excellence in Math and Science Teaching (PAEMST)
      • State reviewer for PAEMST
      • Mentor for Iowa applicants seeking National Board Certification
      • Trained in Cognitive Guided Instruction

If applicable local, state or national publications or speaking experiences:

      • 2014 PAEMST Awardee
      • 2018 National Board Certification
      • Member of the Emerging Educators Academy
      • Presented at the Emerging Educators’ Academy (2014-present)

Biographies of Great Prairie AEA Regional Director Candidates

Heather G. Coffman

Hi, my name is Heather G. Coffman. I am employed with the Van Buren County CSD and have been since July of 2009. I began with this district as their Statewide Voluntary Preschool Program teacher and then transferred to the third grade. I began with the TLC program as a mentor teacher and now have been in the Master Teacher position for the past three years. My husband, Wayne, and I live in Douds with our children.

Once I became a third-grade teacher and was developing my understanding of the Common Core standards, I worked closely with our local Great Prairie AEA and with Lori Mueller. I have developed a deep love for math, diving into our standards and gaining great knowledge. I enjoy assisting others in their learning around the math standards through professional development and instructional coaching support, but most importantly, my passion is to work with children and to enhance their learning so that they will become mathematicians.

I received my Bachelor’s degree from Bueno Visa University and my Master’s degree from Northwest Missouri State.

I look forward to serving as Great Prairie Regional Director on the ICTM board.

JUlie Yurko

My name is Julie Yurko and I am running for a second term as the ICTM Great Prairie Regional Director. I grew up in Granite City, IL, right across the river from St. Louis, MO. I studied Mathematics and Secondary Education at Lindenwood University and got my Master's degree in Educational Administration at Eastern Illinois University. I started working in Fort Madison, IA in 2010 after working in Illinois as a high school Math teacher for 17 years. After 23 years as a classroom teacher, I took on the role of K-12 Math Instructional Coach in Fort Madison. I am a member of the Iowa State Math Leadership Team, NCTM, NCSM, and have been the ICTM Conference Chair for the last 3 years (sorry about cancelling this year - darn Covid!).

My role as Math Instructional Coach is to support teachers and students in the Mathematics classroom. With newly adopted Math curriculum, I spend time coaching teachers, observing classrooms, and providing feedback to make sure every teacher and student succeeds. You may see me working with whole classes or small groups of students, collaborating with teachers individually, or working with teachers in their Professional Learning Communities for school-wide improvement, building teacher capacity, and increasing student engagement.

When I am not at school, you can find me traveling, camping, hiking, quilting, attending concerts, or rooting on the St. Louis Cardinals.

Biographies of Northwest AEA Regional Director Candidates

Valerie Sitzmann

AEA that you live or work in: Northwest AEA

Current Job Position: Math Consultant at NWAEA

Previous Job Experiences: Middle School Math at Kingsley-Pierson (24 years)

Education: University of Iowa (BS K-8 Mathematics Education)

Wayne State College (MSE Curriculum and Instruction/Instructional Leadership)

Professional Memberships: ICTM, NCTM, AMTE, ASCE, State Math Lead Team

Leadership Experiences in Mathematics education: Math Coach/Instructional Coach

If applicable local, state or national publications or speaking experiences: I co-presented at the ICTM conference with Vicki Hamdorf.

Position that you are seeking on the ICTM Board: Northwest AEA Regional Director

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