Differential-reinforcement-of-low-rate (DRL) schedules can be used to decrease, but not eliminate, excessive bids for teacher attention in a classroom. There are two primary methods of implementing a DRL: full session and spaced responding. Some research suggests that the full-session DRL may eliminate target responding. The purpose of the current study was to compare the effectiveness of and preference for the two DRL methods in a simulated preschool classroom. Three participants completed difficult puzzles in baseline, both DRL, and differential-reinforcement-of-other-behavior (DRO) conditions. In the spaced-responding and full-session DRL conditions, the optimal rate of bids for attention was approximately 75% (two participants) or 50% (one participant) of baseline responding. All participants requested attention near the optimal criterion in both DRL conditions and at a lower rate (near zero) in the DRO condition. Treatment preference of the students was assessed in a concurrent-chain arrangement. All participants preferred both types of DRL conditions to DRO, and two participants showed a preference for the full-session DRL. Results suggest that either DRL procedure may be suitable for a preschool classroom, but a full-session DRL may be ideal.