Based on the specific textbook title "Libro de Historia, Geografía y Economía 2 Secundaria" (typically used in Peru for 2nd year of secondary school), a highly useful feature would be an .

"No memorices fechas. Conecta el lugar con el recurso y el recurso con el conflicto." (Don't memorize dates. Connect the place to the resource, and the resource to the conflict.)

Here is the feature concept: (Connect: Time, Space, and Money)