Seidlitz Education Logo


Our Team

Isaac Márquez
Isaac Márquez
Content Developer/Consultant

Isaac is developing Social Studies and Science visuals and conducting training for The Visual Non-Glossary. Isaac also serves Seidlitz Education as an educational consultant, specializing in teaching science to emergent bilingual students and engaging students with educational technology. Isaac previously served as a bilingual instructional specialist, an instructional technology specialist, and a bilingual science and math teacher. Isaac has a BS in Business Administration from The University of Texas at Dallas.

Contact Isaac
Julie Gibson
Julie Gibson
Content Developer/Consultant

Julie is developing Social Studies and Science visuals and conducting training for The Visual Non-Glossary. Julie also serves Seidlitz Education as an educational consultant, specializing in teaching science to emergent bilingual students and the 5E model of instruction. She previously served as a bilingual elementary science facilitator and a self-contained dual language teacher of a diverse population, including emergent bilingual students. Julie has a BA in Spanish from Texas A&M University.

Contact Julie
Areli Amador
Areli Amador
Content Developer

Areli is developing Math and Social Studies visuals, and she is also responsible for transadapting all visuals into Spanish. She previously served as a dual-language, self-contained 5th-Grade teacher in a Title I district in San Antonio, TX, where she used visuals from the VNG with her students. Areli has a BS in Psychology from Texas A&M University.

Contact Areli
Leon MacCormack
Leon MacCormack
Content Developer

Leon MacCormack is developing secondary Social Studies visuals. He previously served as a high school Social Studies teacher at a Title I district in San Antonio, TX. Leon has a BS in Anthropology from Texas State University at San Marcos.

Contact Leon
Grecia Martinez
Grecia Martinez
Content Developer

Grecia is a high school ESL teacher developing secondary Social Studies visuals. Grecia has a BA in International Relations and Global Studies and a minor in Sociology from the University of Texas at Austin. She is also currently working on her MA in Educational Policy Studies at Boston University.

Contact Grecia
Alejandro Pérez González
Alejandro Pérez González
Lead Web Developer

Alejandro is innovating The Visual Non-Glossary website and other platforms for Seidlitz Education, as well as creating automation systems, such as pre-made lesson plans. He has a BS in Computer Science from the University of Houston.

Contact Alejandro
Stephen Fleenor
Stephen Fleenor, PhD
Chief Digital Officer

Stephen is leading digital content development for Seidlitz Education. He has served with Seidlitz Education as an educational consultant, and prior to that served as a teacher and instructional coach in a Title I district in San Antonio, TX. Stephen has a BS in Biology from the University of Texas at Austin, a PhD in Developmental Biology from Oxford University, and a MEd in School Leadership from Incarnate Word University.

Contact Stephen