Leslie Harper 
¿Qué es el sistema de controles y equilibrios? (What Are Checks and Balances?) [PDF ebook] 

Readers will be introduced to the three branches of the United States government and learn how they work together. Accessible text explains the power held by the judicial, legislative, and executive branches of government. Limitations of each power are analyzed. Each chapter asks and answers a question about the purpose and function of checks and balances. These engaging questions will spark young readers” curiosity about politics, government, and the political process.