ORDER OF THE UNITS FOR SCIENCE, GEOGRAPHY AND HISTORY
FIRST UNIT: PREHISTORY AND ANTIQUITY: SPAIN (BOOK UNIT 11)
SECOND UNIT: THE MIDDLE AGES: SPAIN (BOOK UNIT 12)
THIRD UNIT: THE EARLY MODERN PERIOD: SPAIN (BOOK UNIT 13)
FOURTH UNIT: MODERN AND CONTEMPORANY ERA: SPAIN (BOOK UNIT 14)
FIFTH UNIT: ECOSYSTEMS AND ENVIRONMENT (BOOK UNIT 1)
SIXTH UNIT: SENSITIVITY (BOOK UNIT 2)
SEVENTH UNIT: REPRODUCTION (BOOK UNIT 3)
EIGHTH UNIT: ENERGY, LIGHT AND SOUND (BOOK UNIT 4)
NINTH UNIT: ELECTRICITY AND MAGNETISM (BOOK UNIT 5)
TENTH UNIT: FORCES AND MACHINES (BOOK UNIT 6)
ELEVENTH UNIT: THE EARTH AND THE UNIVERSE (BOOK UNIT 7)
TWELFTH UNIT: PHYSICAL GEOGRAPHY: SPAIN (BOOK UNIT 8)
THIRTEENTH UNIT: HUMAN GEOGRAPHY: SPAIN (BOOK UNIT 9)
FOURTEENTH UNIT: EUROPE (BOOK UNIT 10)
FIRST UNIT: PREHISTORY AND ANTIQUITY: SPAIN (BOOK UNIT 11)
SECOND UNIT: THE MIDDLE AGES: SPAIN (BOOK UNIT 12)
THIRD UNIT: THE EARLY MODERN PERIOD: SPAIN (BOOK UNIT 13)
FOURTH UNIT: MODERN AND CONTEMPORANY ERA: SPAIN (BOOK UNIT 14)
FIFTH UNIT: ECOSYSTEMS AND ENVIRONMENT (BOOK UNIT 1)
SIXTH UNIT: SENSITIVITY (BOOK UNIT 2)
SEVENTH UNIT: REPRODUCTION (BOOK UNIT 3)
EIGHTH UNIT: ENERGY, LIGHT AND SOUND (BOOK UNIT 4)
NINTH UNIT: ELECTRICITY AND MAGNETISM (BOOK UNIT 5)
TENTH UNIT: FORCES AND MACHINES (BOOK UNIT 6)
ELEVENTH UNIT: THE EARTH AND THE UNIVERSE (BOOK UNIT 7)
TWELFTH UNIT: PHYSICAL GEOGRAPHY: SPAIN (BOOK UNIT 8)
THIRTEENTH UNIT: HUMAN GEOGRAPHY: SPAIN (BOOK UNIT 9)
FOURTEENTH UNIT: EUROPE (BOOK UNIT 10)