### FIRST GRADE

1-Digit Numbers

problem 23: How much water do I use?

### SECOND GRADE

2-Digit Numbers

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 24: How can I save water?

### THIRD GRADE

2-Digit Numbers

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 24: How can I save water?

3-Digit Numbers

problem 18: How is our water used?

problem 22: Apple vs. Hamburger: Which takes more water to produce?

4-Digit Numbers

problem 21: How long is our Ohio River?

### FOURTH GRADE

3-Digit Numbers

problem 18: How is our water used?

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 26: Global water shortage

4-Digit Numbers

problem 21: How long is our Ohio River?

Large numbers

problem 20: Water tanks in Evansville

Decimal numbers

problem 20: Water tanks in Evansville

### FIFITH GRADE

3-Digit Numbers

problem 22: Apple vs. Hamburger: Which takes more water to produce?

problem 26: Global water shortage

Large Numbers

problem 20: Water tanks in Evansville

Decimal Numbers