SECOND GRADE
problem 3: How many unhealthy days in our area? (page 20)
problem 4: Got healthier air in Vanderburgh? (page 28)
problem 7: Who has the cleanest car? (page 51)
problem 12: What make the problem gas? (page 84)
problem 13: Who makes the problem gas? (page 88)
THIRD GRADE
problem 3: How many unhealthy days in our area? (page 20)
problem 4: Got healthier air in Vanderburgh? (page 28)
problem 7: Who has the cleanest car? (page 51)
problem 12: What make the problem gas? (page 84)
problem 13: Who makes the problem gas? (page 88)
problem 14: How big is our problem gas?(page 98)
FOURTH GRADE
problem 4: Got healthier air in Vanderburgh? (page 28)
problem 7: Who has the cleanest car? (page 51)
problem 14: How big is our problem gas?(page 98)
problem 15:Are we making more problem gas or less?(page 105)
FIFITH GRADE
problem 7: Who has the cleanest car? (page 51)
problem 15:Are we making more problem gas or less?(page 105)