Dorothy Pressman-Tepper – (Director and Founder)  created and directed the Hosea House Tutoring and Mentoring Program in 1993, which is now the L.E.A.D. Promising Youth Program. She has a B.A. in English, M.A. in Teaching from Washington University in St. Louis. She taught 8 years in the Ladue School District and has been self-employed for over 30 years, as a private tutor in SAT and ACT preparation, upper level math (Algebra I, II, Geometry, PreCalc.) and English. She is responsible for curriculum planning, implementation, and development. She maintains communication with students and parents and makes connections for students with resources throughout the community. She is the primary teacher for High School level instruction in Math and Language Arts.

Dr. Karen Gheesling Mullis is responsible for Middle School instruction.  She taught molecular biology at Washington University and tutored in the Pfizer Science Outreach to schools program, as well as Hosea House, now L.E.A.D. Dr. Gheesling Mullis has a B.S. in Chemistry, a Ph.D. in Biochemistry, and Postdoctoral Fellowship in Biochemistry. She has been employed at Pfizer for over 18 years : most currently  as  Director of Project Management in Oncology Clinical Development and Medical Affairs. In 2016 Gheesling Mullis became a PhD Venture Partner at RiverVest and President of Archer Venture Partners   She has brought exciting and innovative science instruction to all grade levels.

Joan Walker – is a teacher in our elementary program. She  has a M.S. in Hearing and Speech. She retired after teaching at the Central Institute for the Deaf, the National Technical Institute for the Deaf, The College School, and MICDS. Ms. Walker is a L.E.A.D. tutor and organizes enrichment activities like field trips and science experiments.

Diane Stern- is our computer teacher and photographer. She has a B.F.A. from Washington University. She is an owner/partner in Reby-Stern Photography and has been a freelance computer consultant since 1996.   Ms. Stern has been with the Hosea House Mentoring/L.E.A.D program since 1997, serving as the computer tutor. She has expanded our students knowledge about the computer to include research, educational gaming, and power point presentations.

 Mary Beth Medley is responsible for the elementary school students in L.E.A.D. during the summer program.  She  is committed to teaching special and general elementary education. She has tutored for over 20 years, while substitute teaching for the past 7 years. She has also taught for 12 years prior in special and general elementary education. Currently she works as a middle school educator, teaching reading and math to students, who have varying disabilities. Ms. Medley began tutoring math and reading with L.E.A.D in 2013.


Sharon Klein  has served as assistant director of the Hosea House Tutoring-Mentoring Program and now as a part time teacher and mentor for L.E.A.D. Promising Youth. She acts as a liaison in the community connecting our students with necessary resources to find job training, higher education, and jobs.

Dr. Bethany Sleckman is a physician at Mercy Hospital where she specializes in oncology and clinical research. She graduated from Duke University with a BSE and an MD. Bethany enjoys sharing her love of learning with the middle school girls.

Wendy Schneider teaches part-time in our elementary school program. She received her Bachelor’s degree from Washington University in St. Louis and majored in elementary education and performing arts.  She taught 1st – 5th grade at Riverway Elementary School prior to being hired full-time at STAGES ST. LOUIS.  Over the course of her career, she has also worked at Girls Incorporated of St. Louis, Make-A-Wish®, and Fontbonne University.  Wendy enjoys sharing special books with her students and watching their confidence balloon as they conquer new learning objectives.  In addition to teaching, Wendy enjoys applying her grant writing experience for L.E.A.D.