Marnina taught Spanish for nine years in Detroit Public Schools at Foreign Language Immersion and Culture Studies, where she co-authored the Spanish I and II curriculum using EntreCulturas and led district-wide language training. Before this, she taught English in Costa Rica for two years, developing language programs for children and adults and discovering a love for Latin dance.

As a Fulbright-Hays Group Project Abroad participant in Brazil and Fund for Teachers Fellow in Cuba, Marnina explored Afro-Latin culture, creating rich, intercultural resources for Spanish students.

Marnina has presented at MittenCI, Michigan World Language Association conferences, and the Central States Conference on the Teaching of Foreign Languages. Now, as an Instructional Strategist on the Professional Development team at Wayside Publishing, she supports language teachers nationwide, sharing strategies to make teaching manageable, impactful, and joyful. She is especially excited about her work on developing the Expand eLearning courses as she continues to learn how to best create engaging asynchronous learning experiences for educators.