This is the 14472nd most frequent Spanish word.
útiles
Useful tools or supplies.
In this sentence, 'útiles' is used as an adjective describing materials as being helpful or practical for accomplishing the project.
Necesitamos comprar materiales útiles para el proyecto.
We need to buy useful materials for the project.
Here, 'útiles' is short for 'útiles escolares', referring to tools and materials used in an educational context.
En la papelería compré útiles escolares para mis hijos.
At the stationery store, I bought school supplies for my children.
In this sentence, 'útiles' describes the advice as being valuable and beneficial in the context of preparing and giving a presentation.