Credits
Lots of the practice problems and hints you see come from people who shared their work for everyone to use. Thank you!
AcumenTutor original practice
Problems labelled AcumenTutor are original practice made for AcumenTutor. They are not OATutor or OpenStax adaptations. Their license label is "AcumenTutor original". The source credit under each question identifies its origin.
OATutor practice problems
Problems labelled OATutor, their original hints, scaffolds and skill model come from the OATutor content library (https://github.com/CAHLR/OATutor-Content) by the OATutor Project, Computational Approaches to Human Learning (CAHL) research lab, UC Berkeley (https://oatutor.io). Many items were adapted by OATutor from OpenStax textbooks (Rice University, https://openstax.org) and other open courses. These credits cover only content served in AcumenTutor. OpenStax Calculus Volume 1 adaptations (CC BY-NC-SA) and items with NonCommercial or ShareAlike licenses are excluded from practice and checks.
License: Creative Commons Attribution 4.0 (CC BY 4.0), https://creativecommons.org/licenses/by/4.0/. Each problem keeps its own source and license information, and the "Original:" note under a problem names where it came from. No endorsement by OATutor, CAHL, UC Berkeley or OpenStax is implied.
What Acumen Tutor changed
- Problems are picked by our own mastery tracker, for your grade, skipping ones you've seen. Only the first step of each problem is shown.
- OATutor skills are matched to Common Core math standards, and problems are shown under those standards.
- Problem text pieces are combined into one question, with repeats removed.
- Line breaks, figures and math (with KaTeX) are rendered, and HTML is limited to a safe set. Links to other websites are turned into plain text.
- Hints that just give away the answer are removed; scaffold hints are shown as plain hints.
- On the answer-feedback path, sentences that reveal the answer are filtered out.
- An AI tutor (Anthropic Claude) writes extra hints and checks what kind of mistake was made, alongside the original hints. "Similar problems" are new AI-written problems based on an OATutor question.
- Answers are checked by our own checker; randomised problem numbers are not used.
- Kid-friendly topic names are rewritten Common Core standards, not OATutor text.
- OATutor's skill-learning settings (BKT parameters) are loaded, but your progress is currently tracked with our own default settings.
Please cite
Pardos, Z.A., Tang, M., Anastasopoulos, I., Sheel, S.K., Zhang, E. (2023). OATutor: An Open-source Adaptive Tutoring System and Curated Content Library for Learning Sciences Research. CHI '23, Article 416. https://doi.org/10.1145/3544548.3581574
OATutor software
Acumen Tutor's adaptive design (mastery tracking with Bayesian Knowledge Tracing and tutored hints) follows the OATutor system (https://github.com/CAHLR/OATutor). No OATutor code is copied; our version is written independently.
Other open content and software
- KaTeX 0.16.9 (math typesetting, https://katex.org) — MIT License, Copyright (c) 2013-2020 Khan Academy and other contributors. Full license.
- Common Core State Standards — © 2010 National Governors Association Center for Best Practices and Council of Chief State School Officers.
- Chart.js (MIT), Mermaid (MIT), D3 (ISC), marked (MIT), Lucide icons (ISC).
OATutor MIT License text
MIT License Copyright (c) 2023 Zachary A. Pardos (@zpardos) - CAHL research lab Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.