1. Begin the lesson by reviewing that statistics are very important in baseball, so much so that hitters and pitchers often come to be identified by their hitting and pitching stats.

2. Explain that just like batting average, slugging percentage is a comparison statistic. Slugging percentage (SLG) measures a batter’s ability to hit with power.

3. Write down the formula for slugging percentage on the board:

Slugging Percentage = Total Number of Bases

Number of At Bats

4. The number of total bases can be calculated by finding the sum of the following:

• Number of singles x 1 base

• Number of doubles x 2 bases

• Number of triples x 3 bases

• Number of home runs x 4 bases

5. Give students the following practice problem:

• Ryan Howard comes up to bat 7 times in a doubleheader. He hits two singles, one double, no triples, and two home runs. What is his slugging percentage for the two games?

6. Go over the practice problem with students.

• 2 singles x 1 = 2 bases

• 1 double x 1 = 2 bases

• 0 triples x 3 = 0 bases

• 2 home runs x 4 = 8 bases

• 12 total bases/7 at bats = 1.714

7. Explain that just like batting averages, slugging percentages have to be rounded to the thousandths place.

8. Provide each student with a baseball card. Ask students, “Given the information on the back of the card, do you have enough data to be able to determine the player’s slugging percentage?”

9. Guide students to understand that all data necessary for calculating slugging percentage is on the back of the card. While the numbers of doubles, triples, and home runs are listed, the number of singles is not. To find the number of singles, the number of 2B, 3B, and HR is subtracted from the number of hits (H). Once the number of singles is determined, slugging percentage can be calculated.

10. Introduce the activity.