An effective teacher organizes instruction to achieve moderate to high student success rates, while challenging students beyond the initial information. The student success rate provides valuable data to help teachers determine an appropriate level of difficulty and pacing. Success is defined as high, moderate, or low based on student understanding of tasks and errors. Consistently, instruction that achieves moderate to high success increases achievement, as more content is covered at the student's level of understanding, especially for lecture-based instruction. Instruction promoting low error rates also improves student self-esteem and attitudes. Engaging students through techniques like eliciting behaviors, providing feedback, using activities, praise, monitoring, and limiting individual contact time is positively correlated with higher student success rates.