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About Us

MRI Author Team

Led by Marilyn Burns, founder of Math Solutions, the MRI author team—Ruth Cossey, Leo Kostelnik, Melody Randel, Mallika Scott, and Lynne Zolli—are all Math Solutions instructors with extensive experience teaching in the classroom and delivering professional development nationally.

Marilyn Burns

Marilyn Burns

Marilyn Burns is an award-winning mathematics educator and the founder of Math Solutions. She has been a classroom teacher for almost 50 years, and has created numerous children’s books and professional development resources. Marilyn is the lead author and creator of Do The Math, HMH’s successful intervention program on numbers and operations.

Ruth Cossey

Ruth Cossey

Ruth Cossey, a Professor of Education at Mills College, has been a classroom teacher in grades 3 through 12 as well as a pre-service mathematics and science instructor, professional development presenter, and conference speaker. Ruth is the co-author of Family Math and a contributor to educational journals.

Leo Kostelnik

Leo Kostelnik

Leo Kostelnik, a K–8 principal, has been a classroom teacher in grades 1 through 12, as well as a mentor teacher and professional development presenter. Leo is also a coauthor of HMH's Do The Math intervention program.

Melody Randel

Melody Randel

Melody Randel, a classroom teacher in grades 3 through 8, has served as a mentor teacher and pre-service instructor. Melody is also a professional development presenter and conference speaker.

Mallika Scott

Mallika Scott

Mallika Scott, the co-founder of S&S Math Services, has been a classroom teacher in grades 2 through 8 as well as a math coach, mentor teacher, professional development presenter, and conference speaker. Mallika is also a coauthor of HMH's Do The Math intervention program.

Lynne Zolli

Lynne Zolli

Lynne Zolli, a classroom teacher in grades 1 through 6, has also been a mentor teacher, professional development leader, and conference speaker. Lynne has served as a grant writer, is an author of Math Solutions professional learning books, and is also a coauthor of HMH's Do The Math intervention program.

Software Development Team

Led by Cheryl Dodge, project manager for MRI, the software development team—Jesus Martinez, Sydney Osborne, Nihar Patnaik, Chinthu Sachi, and Kevin Utz—are all technology development professionals with a wide variety of experience building web-based applications.

Cheryl Dodge

Director, Instructional Design

Cheryl Dodge is a product developer with extensive experience in educational technology, instructional design, and program development. Cheryl was responsible for leading the development of the web application and collaborating with the author team to produce MRI.


Jesús Martínez Jr.

Project Manager

With a background in music, operations, and office management, Jesús Martínez maintained project schedules, organized collaborative work, and led the development of the MRI website.


Sydney Osborne

Senior Software Engineer/
Tech Lead

Sydney Osborne joined the MRI team with over 12 years of software development experience. Sydney was responsible for designing and programming the MRI application, as well as managing the engineering support staff.

Nihar Patnaik

Product and Functional Design Consultant

Nihar Patnaik developed the product requirements backlog, use cases and user stories, and functional design for MRI, relying on his more than 15 years of business analysis, product development, and project management experience in education, financial services, consumer products, and hi-tech vertical markets.


Chinthu Sachi

Senior Software Test Analyst/
Test Lead

Chinthu Sachi was responsible for developing and implementing the MRI test plan, and managing the support Quality Assurance staff. Chinthu has previous software testing experience in various domains, including finance,
e-commerce, and education.


Kevin Utz

Senior Web/UI Design Consultant

With more than 12 years of experience creating interactive design solutions for educational software, Kevin Utz was responsible for the art direction, user interface and user experience design, building the front-end of the web application, and designing and building the MRI website.

Math Solutions

For more than 30 years, Math Solutions, a division of HMH, has been dedicated to improving students' learning of mathematics by providing educators with the highest quality professional development services, courses, and resources. Founded by nationally recognized mathematics educator, Marilyn Burns, Math Solutions is widely known for its expert instructors, award-winning publications, and research-based support for district and school-wide improvement. Math Solutions provides professional development solutions customized to support best instructional practices in the classroom. For more information, visit www.mathsolutions.com.

With Funding Support from the Bill & Melinda Gates Foundation

Guided by the belief that every life has equal value, the Bill & Melinda Gates Foundation works to help all people lead healthy, productive lives. In developing countries, it focuses on improving people's health with vaccines and other life-saving tools and giving them the chance to lift themselves out of hunger and extreme poverty. In the United States, it seeks to significantly improve education so that all young people have the opportunity to reach their full potential. Based in Seattle, Washington, the foundation is led by CEO Jeff Raikes and Co-chair William H. Gates Sr., under the direction of Bill and Melinda Gates and Warren Buffett.

Special Thanks

Thanks for the additional support provided by:

Dr. Diana Wilmot for preparing the Technical Report to document the validity and reliability of MRI.

Tonja Jarrell for preparing the Literature Review.

Friday Films for the videography of interviews with students.

Tomás Hernández for the videography of interviews with Marilyn Burns.