THIRD GRADE

problem21: How long is our Ohio River? 

problem 46: What state produces the most coal?

FOURTH GRADE

problem21: How long is our Ohio River?

problem 37: Curbside recycling in Vanderburgh

problem 44: 10 states with the highest energy users

problem 46: What state produces the most coal?

Decimal numbers

problem 5: Is our air getting cleaner?

problem 49: Solar energy in our country

FIFITH GRADE

problem 37: Curbside recycling in Vanderburgh

problem 44: 10 states with the highest energy users

problem 46: What state produces the most coal?

Decimal numbers

problem 5: Is our air getting cleaner?

problem 49: Solar energy in our country