learn. grow. bloom.

Serving students from San Francisco to Shanghai


Subject Tutoring

We focus on the subjects in which our tutors have the most expertise.

We offer tutoring in the following subjects:

  • Math
  • Writing
  • Economics

Test Prep

We enable students to approach high-stakes tests with confidence derived from thorough preparation.

We offer test prep in the following areas:

  • SAT
  • ACT
  • GRE


We help students with all parts of the college admissions process.

We offer support in the following areas:

  • Mapping out an admissions strategy
  • Editing personal essays
  • Highlighting extracurriculars


We believe that all students can be successful.

Our tutoring method goes beyond teaching procedural knowledge. With each student, we seek to build a strong conceptual foundation in the material, develop persistence, and build genuine relationships. At bloomtwo, we believe that academic success is not determined by inherent talent, but can be reached through hard work, discipline, and perseverance.

Our pedagogical method relies on:

  • Utilizing mastery learning techniques
  • Providing targeted homework practice
  • Developing growth mindset
  • Modeling goal setting

bloomtwo is named after Bloom's 2 sigma problem, a phenomenon discovered by pioneering education researcher, Benjamin Bloom. Through his research, Bloom discovered that, on average, students who were tutored one-on-one using the mastery learning instruction method scored two standard deviations higher than other students. In other words, these students scored above 98% of the students taught through conventional methods. At bloomtwo, we seek to leverage research-backed educational practices, including mastery learning methods, to empower our student to reach their goals.


Heather is the Founder and Lead Tutor at bloomtwo. She received a Master's degree in Education from Harvard University, where she conducted research on the effectiveness of SAT prep programs.

For the past 12 years, Heather has tutored dozens of students in test prep, math, computer programming, and writing. She has worked as a researcher and computer science educator at Google, a college application reader, and a data analyst at a college access program. Heather cares deeply about building student confidence and motivating students to achieve their goals.