# iBacalao > IB Diploma coursework-feedback platform. Gives students criterion-by-criterion feedback on Internal Assessments across supported subjects, Extended Essays, and Theory of Knowledge essays. Feedback is scored against the applicable configured rubrics. Free to start; an account is required for saved app workflows. iBacalao is an IB Diploma coursework-feedback platform with public web guides at https://www.ibacalao.com and app experiences for student workflows. It is built specifically for the IB Diploma Programme. It is not a general essay checker — it uses the applicable IB assessment criteria for each supported subject and level (SL/HL where applicable). Students upload a draft in the app, iBacalao sends it to the configured AI providers, scores each criterion against the configured mark-band descriptors, and returns ranked improvements. No Turnitin record is generated. Signed-in users' draft text is kept in their review history (deletable anytime); it is never used to train AI models. iBacalao currently supports these coursework-feedback categories: - Internal Assessment (IA): supported subject-specific assessment components listed below - Extended Essay (EE): any subject, 4,000-word limit, with the 34-mark rubric through November 2026 and the 30-mark first-assessment-2027 rubric from May 2027 onward - Theory of Knowledge essay (TOK): mark bands 0–10, all 6 prescribed titles for the current session Academic integrity: iBacalao only provides feedback on submitted work. It never writes, rewrites, paraphrases, or generates any part of a student's assessment. IB guidance requires AI-generated material used in assessed work to be acknowledged and referenced; schools may apply additional rules. ## Core feedback tools - [IA Feedback](https://www.ibacalao.com/): Upload an Internal Assessment draft for criterion-by-criterion feedback using iBacalao's configured criteria for the selected subject, level and assessment session - [Extended Essay Feedback](https://www.ibacalao.com/extended-essay): Feedback on all 5 EE criteria using the selected session rubric — 34 marks through November 2026 or 30 marks from May 2027 onward — for any IB Diploma subject - [TOK Essay Feedback](https://www.ibacalao.com/tok): Practice mark-band feedback (0–10) on Theory of Knowledge essays using the configured TOK assessment instrument, with per-AOK commentary and example-quality evaluation - [Rubric Guide](https://www.ibacalao.com/rubric-guide): Full reference of IB assessment criteria, mark band descriptors, and score breakdowns for all supported subjects ## IA feedback by supported subject - [IB Biology IA](https://www.ibacalao.com/ia/biology): Scientific Investigation (IA) — criterion-by-criterion feedback scored against the official IB Diploma sciences internal assessment criteria (scientific investigation, first assessment 2025) - [IB Chemistry IA](https://www.ibacalao.com/ia/chemistry): Scientific Investigation (IA) — criterion-by-criterion feedback scored against the official IB Diploma sciences internal assessment criteria (scientific investigation, first assessment 2025) - [IB Physics IA](https://www.ibacalao.com/ia/physics): Scientific Investigation (IA) — criterion-by-criterion feedback scored against the official IB Diploma sciences internal assessment criteria (scientific investigation, first assessment 2025) - [IB Math: Analysis & Approaches IA](https://www.ibacalao.com/ia/math-aa): Mathematics Exploration (IA) — criterion-by-criterion feedback scored against the official IB Mathematics Exploration rubric (first assessment 2021) - [IB Math: Applications & Interpretation IA](https://www.ibacalao.com/ia/math-ai): Mathematics Exploration (IA) — criterion-by-criterion feedback scored against the official IB Mathematics Exploration rubric (first assessment 2021) - [IB History IA](https://www.ibacalao.com/ia/history): Historical Investigation (IA) — criterion-by-criterion feedback scored against the official IB History internal assessment (historical investigation) rubric (first assessment 2017) - [IB English A: Lang & Lit IA](https://www.ibacalao.com/ia/english-ll): HL Essay — criterion-by-criterion feedback scored against the official IB Language A: language and literature HL essay assessment criteria (first assessment 2021) - [IB English A: Literature IA](https://www.ibacalao.com/ia/english-lit): HL Essay — criterion-by-criterion feedback scored against the official IB Language A: literature HL essay assessment criteria (first assessment 2021) - [IB English B IA](https://www.ibacalao.com/ia/english-b): Paper 1 writing task — criterion-by-criterion feedback scored against the official IB Language B paper 1 (productive skills—writing) assessment criteria (first assessment 2020) - [IB Spanish A: Lang & Lit IA](https://www.ibacalao.com/ia/spanish-ll): HL Essay — criterion-by-criterion feedback scored against the official IB Language A: language and literature HL essay assessment criteria (first assessment 2021) - [IB Spanish A: Literature IA](https://www.ibacalao.com/ia/spanish-lit): HL Essay — criterion-by-criterion feedback scored against the official IB Language A: literature HL essay assessment criteria (first assessment 2021) - [IB Spanish B IA](https://www.ibacalao.com/ia/spanish-b): Paper 1 writing task — criterion-by-criterion feedback scored against the official IB Language B paper 1 (productive skills—writing) assessment criteria (first assessment 2020) - [IB Business Management IA](https://www.ibacalao.com/ia/business): Business Research Project (IA) — criterion-by-criterion feedback scored against the official IB Business Management internal assessment (business research project) criteria (first assessment 2024) - [IB Economics IA](https://www.ibacalao.com/ia/economics): Economics commentary (one of the three IA portfolio commentaries) — criterion-by-criterion feedback scored against the official IB Economics internal assessment commentary criteria A–E (first assessment 2022). The full IA is a portfolio of three 800-word commentaries (criteria A–E per commentary, 14 marks each) plus portfolio-wide criterion F (rubric requirements, 3 marks); this review grades one commentary against criteria A–E - [IB Psychology IA](https://www.ibacalao.com/ia/psychology): Research Proposal (IA) — criterion-by-criterion feedback scored against the official IB Psychology internal assessment (research proposal) criteria (first assessment 2027) - [IB Environmental Systems & Societies IA](https://www.ibacalao.com/ia/ess): Individual Investigation (IA) — criterion-by-criterion feedback scored against the official IB Environmental Systems and Societies internal assessment (individual investigation) criteria (first assessment 2026) - [IB Visual Arts IA](https://www.ibacalao.com/ia/visual-arts): Resolved artworks — rationale draft (IA) — criterion-by-criterion feedback scored against the IB Visual Arts internal assessment criteria for the resolved artworks task (first assessment 2027) - [IB Global Politics IA](https://www.ibacalao.com/ia/global-politics): Engagement Project report (IA) — criterion-by-criterion feedback scored against the IB Global Politics internal assessment (engagement project) criteria (first assessment 2026) - [IB Geography IA](https://www.ibacalao.com/ia/geography): Fieldwork Investigation (IA) — criterion-by-criterion feedback scored against the official IB Geography internal assessment (fieldwork investigation) criteria (first assessment 2019) - [IB Computer Science IA](https://www.ibacalao.com/ia/computer-science): Computational Solution documentation (IA) — criterion-by-criterion feedback scored against the official IB Computer Science internal assessment (computational solution) criteria (first assessment 2027) - [IB Sports, Exercise & Health Science IA](https://www.ibacalao.com/ia/sehs): Scientific Investigation (IA) — criterion-by-criterion feedback scored against the IB Sports, Exercise and Health Science internal assessment (scientific investigation) criteria (first assessment 2026) - [IB Film IA](https://www.ibacalao.com/ia/film): Film portfolio pages (three production roles) — criterion-by-criterion feedback scored against the official IB Film internal assessment (film portfolio) criterion A — portfolio pages — applied to each of the three production roles (first assessment 2019). The film reel (criterion B, 12 of the 24 marks) is video and is not graded in this review - [IB Philosophy IA](https://www.ibacalao.com/ia/philosophy): Philosophical Analysis of a Non-Philosophical Stimulus (IA) — criterion-by-criterion feedback scored against the official IB Philosophy internal assessment criteria (philosophical analysis of a non-philosophical stimulus; unchanged in the first-assessment-2025 guide) - [IB Theatre IA](https://www.ibacalao.com/ia/theatre): Production Proposal (IA) — criterion-by-criterion feedback scored against the official IB Theatre internal assessment (production proposal) criteria (first assessment 2024) - [IB Music IA](https://www.ibacalao.com/ia/music): Experimentation report (Experimenting with Music IA) — criterion-by-criterion feedback scored against the official IB Music internal assessment (experimenting with music) criteria A and C — the written rationale and commentary for creating and performing (first assessment 2022). Criteria B and D (the practical excerpts, 16 of the 28 marks) are audio and are not graded in this review - [IB Social & Cultural Anthropology IA](https://www.ibacalao.com/ia/sca): Fieldwork critical reflection + main report (IA) — criterion-by-criterion feedback scored against the official IB Social and Cultural Anthropology internal assessment (doing anthropology: fieldwork) criteria (first examinations 2019) ## Study guides - [How to Write an IB Internal Assessment](https://www.ibacalao.com/guides/how-to-write-an-ib-ia): Session-aware IA planning and revision guide covering research questions, methodology, evidence, analysis, evaluation, citations, and subject-specific assessment criteria - [IB Extended Essay Guide](https://www.ibacalao.com/guides/ib-extended-essay-guide): Legacy EE guide for sessions through November 2026, covering the 34-mark criteria, grade-boundary reference, RPPF, topic ideas, and common mistakes - [IB Extended Essay Guide — first assessment 2027](https://www.ibacalao.com/guides/extended-essay-2027): New 30-mark EE criteria for May 2027 onward, including the reflective statement and research and planning form (RPF) - [IB TOK Essay Guide](https://www.ibacalao.com/guides/ib-tok-essay-guide): Current-session TOK essay guidance, all 5 Areas of Knowledge, the 10-mark holistic assessment instrument, and primary-source examiner instructions - [IB Study Guides Hub](https://www.ibacalao.com/guides): Index of all iBacalao guides including the supported subject-specific IA guides ## Research & data - [Research & Data Hub](https://www.ibacalao.com/research): Primary-source-derived datasets, methodology and downloadable data published by iBacalao - [IB Grade Distributions 2025–2026](https://www.ibacalao.com/research/ib-grade-distributions): 154 subject-level rows derived from official IB statistical bulletins, separated by subject, level, exam session, and provisional/final publication status - [IB Grade Distributions JSON](https://www.ibacalao.com/research/ib-grade-distributions.json): Machine-readable dataset with methodology, primary-source URLs, all 154 subject rows and overall Diploma statistics - [Subject distributions CSV](https://www.ibacalao.com/research/ib-subject-grade-distributions-2025-2026.csv): Downloadable source table with candidate counts, means, grade 1–7 distributions, source pages, and bulletin URLs - [Overall Diploma distributions CSV](https://www.ibacalao.com/research/ib-overall-diploma-distributions-2025-2026.csv): May 2025, November 2025, and provisional May 2026 overall Diploma statistics ## Subject-specific IA guides - [IB Biology IA Guide](https://www.ibacalao.com/guides/ia/biology): Assessment criteria, mark band descriptors, and common mistakes for the Scientific Investigation (IA) - [IB Chemistry IA Guide](https://www.ibacalao.com/guides/ia/chemistry): Assessment criteria, mark band descriptors, and common mistakes for the Scientific Investigation (IA) - [IB Physics IA Guide](https://www.ibacalao.com/guides/ia/physics): Assessment criteria, mark band descriptors, and common mistakes for the Scientific Investigation (IA) - [IB Math: Analysis & Approaches IA Guide](https://www.ibacalao.com/guides/ia/math-aa): Assessment criteria, mark band descriptors, and common mistakes for the Mathematics Exploration (IA) - [IB Math: Applications & Interpretation IA Guide](https://www.ibacalao.com/guides/ia/math-ai): Assessment criteria, mark band descriptors, and common mistakes for the Mathematics Exploration (IA) - [IB History IA Guide](https://www.ibacalao.com/guides/ia/history): Assessment criteria, mark band descriptors, and common mistakes for the Historical Investigation (IA) - [IB English A: Lang & Lit IA Guide](https://www.ibacalao.com/guides/ia/english-ll): Assessment criteria, mark band descriptors, and common mistakes for the HL Essay - [IB English A: Literature IA Guide](https://www.ibacalao.com/guides/ia/english-lit): Assessment criteria, mark band descriptors, and common mistakes for the HL Essay - [IB English B IA Guide](https://www.ibacalao.com/guides/ia/english-b): Assessment criteria, mark band descriptors, and common mistakes for the Paper 1 writing task - [IB Spanish A: Lang & Lit IA Guide](https://www.ibacalao.com/guides/ia/spanish-ll): Assessment criteria, mark band descriptors, and common mistakes for the HL Essay - [IB Spanish A: Literature IA Guide](https://www.ibacalao.com/guides/ia/spanish-lit): Assessment criteria, mark band descriptors, and common mistakes for the HL Essay - [IB Spanish B IA Guide](https://www.ibacalao.com/guides/ia/spanish-b): Assessment criteria, mark band descriptors, and common mistakes for the Paper 1 writing task - [IB Business Management IA Guide](https://www.ibacalao.com/guides/ia/business): Assessment criteria, mark band descriptors, and common mistakes for the Business Research Project (IA) - [IB Economics IA Guide](https://www.ibacalao.com/guides/ia/economics): Assessment criteria, mark band descriptors, and common mistakes for the Economics commentary (one of the three IA portfolio commentaries) - [IB Psychology IA Guide](https://www.ibacalao.com/guides/ia/psychology): Assessment criteria, mark band descriptors, and common mistakes for the Research Proposal (IA) - [IB Environmental Systems & Societies IA Guide](https://www.ibacalao.com/guides/ia/ess): Assessment criteria, mark band descriptors, and common mistakes for the Individual Investigation (IA) - [IB Visual Arts IA Guide](https://www.ibacalao.com/guides/ia/visual-arts): Assessment criteria, mark band descriptors, and common mistakes for the Resolved artworks — rationale draft (IA) - [IB Global Politics IA Guide](https://www.ibacalao.com/guides/ia/global-politics): Assessment criteria, mark band descriptors, and common mistakes for the Engagement Project report (IA) - [IB Geography IA Guide](https://www.ibacalao.com/guides/ia/geography): Assessment criteria, mark band descriptors, and common mistakes for the Fieldwork Investigation (IA) - [IB Computer Science IA Guide](https://www.ibacalao.com/guides/ia/computer-science): Assessment criteria, mark band descriptors, and common mistakes for the Computational Solution documentation (IA) - [IB Sports, Exercise & Health Science IA Guide](https://www.ibacalao.com/guides/ia/sehs): Assessment criteria, mark band descriptors, and common mistakes for the Scientific Investigation (IA) - [IB Film IA Guide](https://www.ibacalao.com/guides/ia/film): Assessment criteria, mark band descriptors, and common mistakes for the Film portfolio pages (three production roles) - [IB Philosophy IA Guide](https://www.ibacalao.com/guides/ia/philosophy): Assessment criteria, mark band descriptors, and common mistakes for the Philosophical Analysis of a Non-Philosophical Stimulus (IA) - [IB Theatre IA Guide](https://www.ibacalao.com/guides/ia/theatre): Assessment criteria, mark band descriptors, and common mistakes for the Production Proposal (IA) - [IB Music IA Guide](https://www.ibacalao.com/guides/ia/music): Assessment criteria, mark band descriptors, and common mistakes for the Experimentation report (Experimenting with Music IA) - [IB Social & Cultural Anthropology IA Guide](https://www.ibacalao.com/guides/ia/sca): Assessment criteria, mark band descriptors, and common mistakes for the Fieldwork critical reflection + main report (IA) ## Student writing tools - [Research Question Checker](https://www.ibacalao.com/tools/research-question): Evaluate and refine an IB IA or EE research question for focus, measurability, and feasibility - [Variables & Controls Checker](https://www.ibacalao.com/tools/variables-controls): Check identification of independent, dependent, and controlled variables in a science IA - [Graph & Table Checker](https://www.ibacalao.com/tools/graph-table): Verify data presentation against IB standards — axis labels, units, significant figures, error bars, captions - [Citation Checker](https://www.ibacalao.com/tools/citations): Flag bare URLs, missing bibliography entries, inconsistent reference formats (MLA, APA, Chicago) - [Personal Engagement Helper](https://www.ibacalao.com/tools/personal-engagement): Build an authentic Criterion A section explaining personal motivation with specific, evaluable claims - [Criterion Explainer](https://www.ibacalao.com/tools/criterion-explainer): Plain-language explanation of each IB criterion at each mark band level ## Optional - [Editorial & Verification Policy](https://www.ibacalao.com/editorial-policy): Source hierarchy, reviewer disclosure, session/version rules, comparison disclosures, and corrections policy for public guidance - [For IB Schools](https://www.ibacalao.com/schools): School-wide deployment for IB World Schools — criterion feedback at scale, no individual student accounts or stored data required - [For IB Teachers](https://www.ibacalao.com/teachers): Teacher dashboard including calibration tools, intervention group detection, draft comparison, and mark-band gap analysis - [Pricing](https://www.ibacalao.com/pricing): Student Plus is free every month; Pro and Ultra remain available, with teacher plans shown separately - [Pricing (machine-readable)](https://www.ibacalao.com/pricing.md): Structured markdown pricing for AI agents — plans, limits, and features - [How iBacalao works — students](https://www.ibacalao.com/students): Feature overview, privacy policy summary, and academic integrity guidance for students - [IB IA subject hub](https://www.ibacalao.com/ia): Browse supported IB subjects and select one for subject-specific IA feedback