To determine how many students could have been rewarded with the mini candy bars, we can set up the problem based on the number of candy bars given away.
Each student received 3 mini candy bars, and the teacher gave away no more than 6 mini candy bars in total.
Let \( x \) be the number of students rewarded. The total number of mini candy bars given to \( x \) students is:
\[ 3x \leq 6 \]
To find the maximum number of students, we can divide both sides of the inequality by 3:
\[ x \leq \frac{6}{3} \]
This simplifies to:
\[ x \leq 2 \]
This means the possible values for \( x \) (the number of students) are 0, 1, or 2. Therefore, a maximum of 2 students could have been rewarded with mini candy bars.
So, the possible number of students rewarded in Jennifer's class is 0, 1, or 2.