# iBacalao > AI-powered IB Diploma study platform. Gives IB Diploma students criterion-by-criterion feedback on Internal Assessments (all 25 subjects), Extended Essays (any subject), and Theory of Knowledge essays. Feedback is scored against official IB rubrics. Free to try, no account required. iBacalao is a web application at ibacalao.com built specifically for the IB Diploma Programme. It is not a general essay checker — it uses the verbatim IB assessment criteria for each subject and each level (SL/HL where applicable). Students upload a draft, iBacalao reads it via the Anthropic Claude API, scores every criterion against the official mark-band descriptors, and returns ranked improvements. Work is never stored — no submission record is created, and no Turnitin record is generated. iBacalao covers every externally-assessed component of the IB Diploma: - Internal Assessment (IA): available for all 25 IB Diploma subjects - Extended Essay (EE): any subject, all 5 criteria (A–E), 34 marks total, 4,000-word limit - 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. It is designed to function like a teacher's formative comment — allowed under IBO academic integrity guidelines. ## Core feedback tools - [IA Feedback](https://ibacalao.com/): Upload any IB Internal Assessment draft for criterion-by-criterion feedback against the official rubric for your subject and level - [Extended Essay Feedback](https://ibacalao.com/extended-essay): Feedback on all 5 EE criteria (Criterion A: Focus and Method, B: Knowledge and Understanding, C: Critical Thinking, D: Presentation, E: Engagement) — any IB Diploma subject - [TOK Essay Feedback](https://ibacalao.com/tok): Mark-band feedback (0–10) on Theory of Knowledge essays scored against the official IB assessment instrument (first assessment 2022), with per-AOK commentary and example quality evaluation - [Rubric Guide](https://ibacalao.com/rubric-guide): Full reference of IB assessment criteria, mark band descriptors, and score breakdowns for all supported subjects ## IA feedback by subject (all 25 IB Diploma subjects) - [IB Biology IA](https://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://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://ibacalao.com/guides/how-to-write-an-ib-ia): Step-by-step IA writing guide covering research questions, personal engagement, methodology, data presentation, analysis, evaluation, and citations — with the exact detail examiners look for - [IB Extended Essay Guide](https://ibacalao.com/guides/ib-extended-essay-guide): Complete EE guide covering all 5 criteria, grade boundaries (A = 28–34 marks, E = 0–6 marks), the RPPF, topic ideas across 8 subjects, and common mistakes - [IB TOK Essay Guide](https://ibacalao.com/guides/ib-tok-essay-guide): Prescribed titles for the current session, all 5 Areas of Knowledge, verbatim mark band descriptors (Excellent 9–10 → Rudimentary 1–2), and how to write a sustained argument - [IB Study Guides Hub](https://ibacalao.com/guides): Index of all iBacalao guides including 25 subject-specific IA guides ## Subject-specific IA guides (25 subjects) - [IB Biology IA Guide](https://ibacalao.com/guides/ia/biology): Assessment criteria, mark band descriptors, and common mistakes for the Scientific Investigation (IA) - [IB Chemistry IA Guide](https://ibacalao.com/guides/ia/chemistry): Assessment criteria, mark band descriptors, and common mistakes for the Scientific Investigation (IA) - [IB Physics IA Guide](https://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://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://ibacalao.com/guides/ia/math-ai): Assessment criteria, mark band descriptors, and common mistakes for the Mathematics Exploration (IA) - [IB History IA Guide](https://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://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://ibacalao.com/guides/ia/english-lit): Assessment criteria, mark band descriptors, and common mistakes for the HL Essay - [IB English B IA Guide](https://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://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://ibacalao.com/guides/ia/spanish-lit): Assessment criteria, mark band descriptors, and common mistakes for the HL Essay - [IB Spanish B IA Guide](https://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://ibacalao.com/guides/ia/business): Assessment criteria, mark band descriptors, and common mistakes for the Business Research Project (IA) - [IB Economics IA Guide](https://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://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://ibacalao.com/guides/ia/ess): Assessment criteria, mark band descriptors, and common mistakes for the Individual Investigation (IA) - [IB Visual Arts IA Guide](https://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://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://ibacalao.com/guides/ia/geography): Assessment criteria, mark band descriptors, and common mistakes for the Fieldwork Investigation (IA) - [IB Computer Science IA Guide](https://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://ibacalao.com/guides/ia/sehs): Assessment criteria, mark band descriptors, and common mistakes for the Scientific Investigation (IA) - [IB Film IA Guide](https://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://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://ibacalao.com/guides/ia/theatre): Assessment criteria, mark band descriptors, and common mistakes for the Production Proposal (IA) - [IB Music IA Guide](https://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://ibacalao.com/guides/ia/sca): Assessment criteria, mark band descriptors, and common mistakes for the Fieldwork critical reflection + main report (IA) ## IB study games - [IB Connections](https://ibacalao.com/games/connections): Daily NYT Connections-style game grouping 16 IB concepts into four themed categories — tests subject vocabulary and cross-subject knowledge - [Termle](https://ibacalao.com/games/termle): Daily Wordle-style game for IB command terms (analyse, compare, discuss, evaluate, examine, etc.) — six tries, IB-specific word list - [IB Mini Crossword](https://ibacalao.com/games/mini): Daily mini crossword with IB vocabulary clues across all subjects - [Mark the Band](https://ibacalao.com/games/markband): Read a real IA excerpt and identify the correct IB rubric mark band — trains rubric recognition - [Strands](https://ibacalao.com/games/strands): Daily NYT Strands-style grid where all words share a hidden IB theme - [Lexicon](https://ibacalao.com/games/lexicon): Build academic IB vocabulary words from a given set of letter tiles ## Student writing tools - [Research Question Checker](https://ibacalao.com/tools/research-question): Evaluate and refine an IB IA or EE research question for focus, measurability, and feasibility - [Variables & Controls Checker](https://ibacalao.com/tools/variables-controls): Check identification of independent, dependent, and controlled variables in a science IA - [Graph & Table Checker](https://ibacalao.com/tools/graph-table): Verify data presentation against IB standards — axis labels, units, significant figures, error bars, captions - [Citation Checker](https://ibacalao.com/tools/citations): Flag bare URLs, missing bibliography entries, inconsistent reference formats (MLA, APA, Chicago) - [Personal Engagement Helper](https://ibacalao.com/tools/personal-engagement): Build an authentic Criterion A section explaining personal motivation with specific, evaluable claims - [Criterion Explainer](https://ibacalao.com/tools/criterion-explainer): Plain-language explanation of each IB criterion at each mark band level ## Optional - [For IB Schools](https://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://ibacalao.com/teachers): Teacher dashboard including calibration tools, intervention group detection, draft comparison, and mark-band gap analysis - [Pricing](https://ibacalao.com/pricing): Free trial available; subscription plans for unlimited submissions - [How iBacalao works — students](https://ibacalao.com/students): Feature overview, privacy policy summary, and academic integrity guidance for students - [IB IA subject hub](https://ibacalao.com/ia): Browse all 25 IB subjects and select one for subject-specific IA feedback