STACK is the world-leading open-source online assessment system for mathematics and STEM.
This page allows you to try some STACK questions. Click on the name of a question in the menu to view it.
Answers will be validated as you enter them. Click 'Submit Answers' to have them assessed.
STACK questions can have random variants. If these are available for a question, you can click 'Next Variant' to see another.
STACK is also available for direct integration in Moodle, ILIAS and through LTI. For more information visit the STACK community page.
There is also a library of STACK questions on this demo site.
The STACK source code, including this API, is Licensed under the GNU General Public, License Version 3. Documentation, sample questions and materials, are licensed under Creative Commons Attribution-ShareAlike 4.0 International. See the STACK licence page for full details.
