Whether you teach native Spanish speakers, bilingual Spanish speakers, or speakers of English only, your students can benefit from an awareness of Spanish cognates. For English onlys, the cognates are simply another dimension, another moment of exposure. 
Here is Subset 1 of the Academic Word List (Coxhead). These words are indispensible for academic reading. It's never too soon to use them in as you speak to students. Following, are the Spanish cognates.
Subset 1: 
analyze approach area assess assume authority available benefit concept consist context constitute contract data define derive distribute economy environment establish estimate evident factor finance formula function income indicate individual interpret involve issue labor legal legislate method occur percent period principle proceed process policy require research respond role section sector significant source specific structure theory vary
Subset 1: Spanish Cognates 
analizar el área asumir la autoridad el beneficio/beneficiar concepto consistir contexto constituir  datos definir derivar distribuir la economía establecer estimar/estimado evidente la función las finanzas la fórmula  el índice el individuo interpretar envolver laborar legal legislar el método ocurrir el por ciento el período principio proceder el proceso requerir responder rol sección  
sector significativo/significante específico la estructura la teoría variar