Calculus Roundtable: Our Team

Since 2013, Calculus Roundtable has built a community of thousands of supporters around the world. To provide a better experience to students we have assembled a highly effective staff that leads with passion and commitment to improving the lives of students and their families.

Jim Hollis
Executive Director
Jim Is the Director and Founder of The Calculus Roundtable. Jim is a school reformer and a social entrepreneur who has worked with some of this country's largest school districts, as well as some of the smallest. Jim has helped to incubate scores of education startups and consulted with state department's of education on data quality and fiscal planning at the site level. Jim directs the executive functions of the organization as well as the coordination, management and administration of the Integrated Technology solutions and services for schools, districts and foundations.
Jim is the former Director of the Innovation Incubator at Pivot Learning Partners. He's also a founding board member of one of the most innovative charter schools in the Bay Area Community School for Creative Education (the first public Waldorf charter school on the West Coast)

Nina Demediuk
Sr. Project Manager
Nina coordinates our Digital Learning Spaces. Nina is an experienced project manager of hardware and software products in a variety of fields including ed-tech, computer accessories and networking. Nina works with partners and institutions to bring STEM learning spaces to our students.
Nina received BSEE in Electrical Engineering from Rutgers University, and a Masters in Electrical Engineering from the Stevens Institute of Technology.

Chad Reed
After School Coordinator (North Bay)
Mr. Reed is in charge of planning, managing and conducting our enrichment and academic programs for our after school clients in the Bay Area. There are twelve elementary schools, three middle schools and two high schools participating in the program. Chad manages our pool of instructional classroom coaches. His responsibilities include day to day supervision of our coaches, staff training, program development, and working collaboratively with each school site to provide the highest quality academic, enrichment and health activities to the program participant.

Jeni Williams
After School Coordinator (South Bay)
Ms Williams coordinates teaching and learning in San Mateo and Santa Clara Counties. Ms William also is a member of the professional development and STEM lesson planning teams. Jeni has a Bachelors of Arts from Stanford University in Psychology, a Masters in Special Education, and a Masters in nonprofit organization management from Cal State Eastbay

Gabriella Lora
Special STEM Projects Coordinator
Ms.Lora manages the launch of new STEM initials with partners and funders. Gabriella is also the CR Board of Director's liaison managing communications and logistics between the team and the board. Gabriella has a Bachelor's of Science in Molecular Biology from the University of South Florida.

Grace Andes
Operations 
Grace manages our STEM Broadcasting Network media asset, our social media including collateral materials and schedules of guests appearances, and production of our STEM kits. Ms Andes also serves as an instructional coach for students.

Lauren Sitter
Instructional Coach 
Lauren coordinates our Math and Science of Indigenous People's program, and supports our Girls Math Club.
Lauren covers our new Northwest Region.

Calculus Roundtable Diversity in STEM Fellows

2nd Year Fellows

Juan Cardenas
Juan is a Mechanical Engineering student at University of California in Berkeley. Mr. Cardenas is studying Nanotechnology and biomechanics. Juan works as a math tutor and instructional coach in our Digital One Room Schoolhouse (DORS) Program Mr Cardenas was elected Valedictorian of high school in Los Angeles
More on Juan

Valeria Landeros
Valeria Landeros is an undergraduate student majoring in EECS at the University of California, Berkeley. Valeria grew up in the community of South Central, Los Angeles and graduated from John C Fremont STEAM Magnet High School. With her EECS major and neuroscience minor she wants to obtain experience and research AI technology and give back to her own community back in LA.

Briana Santana 
Brianna a Electrical Engineering student currently attending University of California in Los Angeles. Brianna works as a math tutor and instructional coach in our 'Girls Math Club'.

John Zelaski
John is a graduate of Xavier University of Louisiana with a degree in biology and Pre-Med with Minors in Spanish & Chemistry. John work with our Bio-Med and Sports Math programs in Richmond and San Leandro, CA.John has been a PAC-12 NCAA football player, an oncology researcher and an HBCU graduate.
John is a member of the prestigious Louis Stokes Louisiana Alliance for Minority Scholars and a ,member of Sigma Alpha Pi.

1st Year Fellows

Alfa Belen
Bios coming soon

Mitchell Chan
Bios coming soon