Mastery Learning is slower at the beginning and faster at the end.

Implementing Mastery Learning requires more time initially for corrective work, as the first unit may take longer due to additional periods allocated for corrections. However, over subsequent units, as students grasp the process, the need for corrective work decreases, allowing for more time to be allocated to enrichment activities. By shifting focus from continuous review to targeted corrections, the instructional process becomes more efficient. This efficiency leads to faster progress through later units, enabling the coverage of more material compared to traditional teaching methods. It is essential to be flexible in pacing guides and prioritize student understanding and readiness for future units over rigid time allocation, as Mastery Learning's slower start paves the way for accelerated learning towards the end.