IB Middle Years Programme Sciences (MYP)

criterion-referenced

Source: official International Baccalaureate specification, verified 2026-09-04. Read directly from the public IB MYP Sciences subject brief (framework current "from 2014"; MYP subjects are assessed continuously against these criteria every year rather than in a single first-examined series, so "firstAssessment" here records the framework's own stated currency date, not an exam sitting). All four criteria are equally weighted (25% each) and each scored on an 8-level achievement scale (1-8, recorded here as marks=8 -- the maximum achievable level, not an exam mark total), assessed by the student's own teacher against published IB rubrics across the year's work and externally moderated by IB sampling -- there is no fixed-duration sitting for any criterion, hence durationMinutes: null throughout, matching this schema's existing convention for non-timed internal assessment. This is Marlbridge's first IB MYP assessment record built without owner-licensed full-guide access; unlike the DP Economics/DP Physics records above, the publicly-available subject brief is sufficient to model MYP correctly because MYP's own official structure genuinely does not include fixed exam papers with raw marks for the great majority of students -- the gap for these 19 IB subjects was about missing marks totals for DP's paper-based exams, which never applied to MYP's criterion-based model in the first place. A separate, optional 'MYP eAssessment' exists for schools/students seeking the formal MYP Certificate or course results (a further externally-set and marked on-screen examination or ePortfolio) -- explicitly NOT modeled as this record's primary components, since most MYP students never sit it and modeling it as the default would misrepresent the qualification most Marlbridge MYP students actually experience. For the record: the brief states its optional on-screen exam comprises three tasks (Knowing and understanding, 25 marks; Investigation skills, 50 marks; Applying science, 25 marks), available in biology, chemistry, physics and integrated sciences -- cited here for completeness, not modeled as a component.