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

Meeting Your Needs

Areas of Service

SAT/ACT Test Prep

Student Writing
Middle school.jpg

AP Courses

College Math

College Students

Elementary School Math


Middle School Math

High School Math


We Want to Hear From You

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Our Community Partners

Gorman Learning Charter Network

Sage Oak Charter School

IEM Schools:
South Sutter,
Ocean Grove,
Sky Mountain

Granite Mountain Charter School