Team Argonaut

Math: Mr. Muller Literacy: Mr. Mize

Social Studies: Mrs. Lefferts Science: Mrs. Nellis

Upcoming important dates:

  • 2/5 - William Smith high school visit (during science classes)
  • 2/8 - Parent Teacher Conferences 4:15 - 7:45pm
  • 2/19 - No School - President's Day holiday
  • Week of March 12 - Personal Wellness Lessons in Science (family communication will come home in the next few weeks)

Course Links

Course Links:

Meet the team!

Social Studies - Mrs. Lefferts

About Me: I grew up in Basking Ridge, NJ, and attended Alvernia College, in Reading, PA, where I majored in History, minored in Secondary Education, and earned a certificate in Secondary Education. I am starting my 22nd year teaching, and am excited to start my third year at Mrachek Middle School. My husband works in the DTC and our children continue to be an integral part of our lives. Ian is starting 9th grade at Eaglecrest High School. Anya is starting 7th grade at Sky Vista Middle School, and Duncan is starting 2nd grade at Mountain Vista Elementary School. I look forward to working with the Mrachek community to ensure every student has the opportunity to shape his/her future.


Math: Mr. Muller

About me: I grew up in Port Elizabeth, South Africa attended Marist Brother’s College from grade school all the way through high school. My professional education started at Dower College of Education where I received a Bachelor of Education majoring in Math and History. I subsequently finished a Bachelor of Arts at the University of Port Elizabeth with majors in History and Psychology. My teaching career began in South Africa where I spent 12 years teaching History, Math and Literacy to 8th-12th grade before moving to the US. My teaching experience includes instruction at all three school levels, namely elementary, middle and high school. In 2000 I moved to the US and taught 8th grade science and social studies for the first two years at Mrachek and then moved to Denver Public schools to pursue permanent residency. It was in Denver that I started teaching middle and high school math at Bruce Randolph 6th-12th. I returned to Mrachek in 2008 as a 7th grade math teacher.

I am married to my wife Michelle and we have two daughters who have just finished their schooling. Michelle works at Public Service Credit Union as a financial consultant. Melissa, my eldest daughter aged 25, completed her second degree (nursing) at CU Denver and works at University Hospital in the NICU. Kelly, aged 23, completed her Master’s degree in Forensic Psychology and has started working as a therapist at a women’s correctional institution.

Job description:

My job is to accelerate learning for every student every day. I do my job by ensuring that each student increases in his/her ability towards proficiency in Math. My community needs me to do my job.

Literacy: Mr. Mize

Vern John Mize

Position: Eighth Grade Literacy Instructor

Education: Metropolitan State College of Denver- Bachelor of Arts

University of Colorado in Denver- Certification in Secondary Education

About Me: I was born in Tupelo, Mississippi. Shortly thereafter, I began my lifelong pilgrimage that has traversed no less than twenty different states in this great nation. I met my wife of fifteen years in years in Gainesville, Florida, in 1996. Together, we moved to Denver in 1997 so that she could pursue her Master’s Degree in Education at the University of Colorado at Denver. Bronwen’s desire and passion for teaching was so infectious that I too decided to pursue a career in teaching, and so after receiving my bachelor’s degree from Metro, I also attended the University of Colorado at Denver to become certified as a secondary teacher. We have two children, Goran Alexander(12) and Hadrian Augustus(9), whom are also students in the APS district. I started teaching at Mrachek in 2012, and served as a sixth grade literacy instructor for the next three years. I am highly excited to move to the team structure this year while inspiring students to realize the power of reading and writing when performed with purpose.

Job Description: My job is to accelerate learning for every student, every day. I do my job by fostering viable relationships with students in order to encourage them to recognize and achieve the peak of their potential. My community needs me to do my job.

Science: Mrs. Nellis

About Me: I was born and raised in Northern California, and I have lived in Colorado for over 20 years. I am a proud resident of Aurora where I live with my husband and our two young sons, Nathan (2nd grade) and Theodore (3 years old).

This is my 2nd year at Mrachek and my 5th in APS. Prior to APS, I taught math and science in the Montbello community in Denver. My educational background includes a Bachelor’s degree in Biology from the University of Colorado at Boulder, a Master's degree in Business Administration, and teaching licensure and numerous graduate credits in Education from Purdue University and the University of Colorado at Denver.

This year, our 8th grade scientists will explore many exciting topics in Physical Science. Our year will include Project-Based Inquiry encompassing the topics of energy, the nature of motion, and weather.

My job is to accelerate learning for every APS student every day. I do my job by leveraging the unique strengths of my students, being a part of the community, and demonstrating a love of learning. My community needs me to do my job.

Please visit my website for class information and content.