Achievement means: a·chieve·ment 1. a thing done successfully, typically by effort, courage, or skill. "to reach this stage is a great achievement" synonyms: attainment, realization, accomplishment, fulfillment, implementation, execution, performance; More 2. the process or fact of achieving something. "the achievement of professional recognition"
1. a break or hole in an object or between two objects. "he came through the gap in the hedge" synonyms: opening, aperture, space, breach, chink, slit, slot, vent, crack, crevice, cranny, cavity, hole, orifice, interstice, perforation, break, fracture, rift, rent, fissure, cleft, divide "a gap in the shutters" a pass or way through a range of hills. 2. an unfilled space or interval; a break in continuity. "there are many gaps in our understanding of what happened"
Achievement gaps are broadly defined as the differences in academic performance between groups of students of different backgrounds and have been documented with respect to students' ethnic, racial, gender, ELL, disability, and income status.
For years now educators have looked to international tests as a yardstick to measure US progress, not there is something that has a great effect on learning than testing: teaching by Linda Darling-Hammond
We can't make headway in raising student performance and closing the achievement gap until we make progress in closing the teaching gap. That means supporting children equitably outside as well inside the classroom, creating a profession that is rewarded and well-supported, and designing schools that offer the conditions for both the student and teaching learning that will move American education forward. Linda Darling Hammond.