Developmental Ed Staff

Tina JacksonDr. Jackson is currently the District Director of Developmental Education at Collin College. In this role she works across all campuses on issues related to developmental education, completion and pathways to careers.  Jackson served as Associate Dean of Science Technology Engineering & Math (STEM) at Dallas County Community College District from 2016-2017.  Tina worked as the statewide coordinator of Community College Programs at the University of Texas at Austin from 2012-2016.  Helping to redesign developmental math throughout all 50 community colleges in the state of Texas.  In 2013, Tina was named a Jackson Scholar by the University Council for Educational Administration. In 2012, Jackson was awarded a Community College Leadership Fellowship from the University of Texas at Austin. In 2012, she also received an award from the Association for the Study of Higher Education to continue her research on STEM Workforce Development in Community Colleges focusing on students of color.  Jackson also serves on the Texas Association of Black Personnel in Higher Education State Board. Dr. Jackson holds a Bachelor’s Degree in Science, a Master’s Degree in Education from the University of Minnesota and a Ph.D. in Educational Administration from the University of Texas at Austin.

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Collin College Professor Catherine ThurmanProfessor Thurman is serving as the Co-Director for the College Readiness and Success Model Grant 2018, which is funded by the Texas Higher Education Coordinating Board.  This is a two year grant that will assist Collin College Community College District with providing additional academic support for Developmental Math students and academic advising as we scale up implementation of corequisite courses. 

Professor Thurman has been with Collin College since 2010 and has been working in developmental education since 2013.  In 2014, Professor Thurman was named a Fellow in Cohort 11 of Project ACCCESS through AMATYC (American Mathematical Association of Two Year Colleges).  In 2016, she received the Engaged Faculty Scholarship for Collin College.  

In her time at Collin, Thurman has served as Department Chair and Discipline Lead for developmental math as well as being involved in numerous initiatives designed to improve retention and completion for developmental math students.  Some initiatives she has been involved in include course redesigns, implementation of Mastery Extension program, working with BASE students, development of co-requisite courses, and design of the Supplemental Instruction and Tutoring program.  She is currently serving as co-Director for the College Readiness and Success Models for 60x30TX – 2018 grant.  

Thurman holds a Bachelor of Arts Degree in Mathematics from Schreiner University and a Master of Science in Mathematics from Oklahoma State University.

Phil Ramirez is a native of Texas, originally from Beaumont, and graduated from the University of North Texas in Denton with a Bachelor's degree in Mathematics.  He is married and has two daughters.  Mr. Ramirez started tutoring students in math, physics and chemistry as a sophomore in high school.  Phil has served as an Associate professor teaching developmental math classes and has served as a full time instructor in the AIM Center at Collin College on the Frisco Campus for six years.  Besides math, Phil enjoys music, movies, sports and weightlifting. Phil Ramirez can be reached at:

Jens StubblefieldJens N. Stubblefield is a native Texan. He graduated from East Texas State University (now Texas A&M Commerce) in 1972 with majors in Math and Computer Science. While in the United States Air Force he earned an MS degree in Systems Management from University of Southern California. Mr. Stubblefield served 30 years in Information Technology field, supporting health care systems. He has served as an Associate Developmental Math faculty at Collin College for 10 years. Jens Stubblefield can be reached at:

Omri CreweOmri Crewe is a lab instructor in the AIM Center at the McKinney Campus.  Mr. Crew has worked at Collin College as an instructor for 32 years. Omri has taught all levels of developmental mathematics in both lecture and self-paced formats.  “It is my pleasure to work with you to improve your mathematical skills and to help you move forward in your college studies. Omri Crewe” Omri Crewe can be reached at:

Bunta YangchareonBunta Yangchareon is a lab instructor in the AIM Center at the McKinney Campus. Bunta has 17 years of teaching experience at Collin College. Bunta has taught all levels of developmental mathematics in both lecture and self-paced formats.  “It is my pleasure to work with you and to help you move forward in your college studies. Bunta Yangchareon” Bunta Yangchareon can be reached at:

Tony AyresTony has taught Mathematics for 20 years.  Mr. Ayers has worked in the Developmental Mathematics department for 17 years at Collin College. Before teaching, he spent 11 years in the finance industry. He enjoys all aspects of teaching; working with students, working with technological programs, working with colleagues, and working to resolve educational challenges.  Tony is a native Texan and has lived in the Dallas area most of his life.  Outside interests include  exercising, attending concerts,  listening to music especially on vinyl plus collecting vinyl albums,  spending time in Deep Ellum, trying  out new restaurants and hanging out with family. Tony Ayers can be reached at:

Pam SewellPam Sewell started at Collin College as an associate faculty member in 1997. In 2000, she became a full-time Instructional Associate and tutored students for the TASP exam. During the summer of 2004, Pam transitioned to teaching mathematics classes in the Learning Pod. Currently, she is working as a Lab Instructor in the AIM Center and assists students as they progress through the computer-based Developmental Mathematics sequence. Pam Sewell can be reached at: