100 POINTS PLEASE HELP Part B: Proofread the following paragraph for a variety of grammatical errors including punctuation (commas, colons, semicolons, etc.), word usage, and parallel structure.

Benjamin Bloom coined the term "Learning for Mastery" and then later "Mastery Learning" in 1968 and 1971 to describe an educational method, in which each student stays with a certain unit of learning material, in a process of assessing and correcting until the objectives of that unit are mastered before moving on to the next unit.