top of page

Introducing Sigma Mathematics


Teaching has always been my passion. I love tutoring many different areas of math to all age groups of students. I also enjoy creating learning plans to suit individual students' need. My goal is to make math learning easier, interesting and more comfortable for each student. My reward is the “I get it now!” moments with my students.

Chinami Nagata-Bottorff


BS, Mathematics/Math Education - 2014​

Southern Oregon University


Math Tutor (2011-current)

Math Tutor and Grader at Southern Oregon University (2012-2014)

Japanese Teacher/Tutor  (2004-2017)

The Tutoring Service You Can Depend On

We think learning math is like building blocks. The stronger you build the foundation, the higher you can build on top. Sigma Mathematics helps you, or your child, build a sturdy math foundation and support the building process at every step. 

We offer one-on-one and small group tutoring so that we can design the best lessons for each student. The lessons can be at your desired locations at your desired time. 

Teacher Writing a Formula on a Blackboard

Areas of Service

  • Elementary School Math

  • Middle School Math

  • High School Math

  • SAT / ACT Prep

  • AP Calculus / AP Statistics

  • College Math

* Currently we are offering online tutoring mainly via Zoom.

Our Community Partners

Gorman Learning Charter Network

Sage Oak Charter School

IEM Schools:
South Sutter,
Ocean Grove,
Sky Mountain

Granite Mountain Charter School

Contact Us 
Home: Contact
bottom of page