Moodle plugins directory: Algebra | Moodle.org
Algebra
Question types ::: qtype_algebra
Maintained by 
Jean-Michel Védrine
Question type where the student must answer by typing an algebra formula. Correctness can be checked by three different methods.
Latest release:
602 sites
245 downloads
28 fans
Current versions available: 5
MOODLE ALGEBRA QUESTION TYPE
Created by Roger Moore
Algebra based question type for Moodle.
This plugin implements an algebraic question type where student responses are treated as an algebraic expression and compared to instructor provided answers using the basic rules of algebra.
Screenshots
Contributors
Jean-Michel Védrine (Lead maintainer)
Roger Moore: Original Author
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Comments 
Comments
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Debug info: Errors found in XMLDB file: Some TABLES previous/next values are incorrect
Error code: ddlxmlfileerror
Stack trace:
line 349 of \lib\ddl\database_manager.php: ddl_exception thrown
line 365 of \lib\ddl\database_manager.php: call to database_manager->load_xmldb_file()
line 436 of \lib\upgradelib.php: call to database_manager->install_from_xmldb_file()
line 1544 of \lib\upgradelib.php: call to upgrade_plugins()
line 349 of \admin\index.php: call to upgrade_noncore()
Thanks for the report,
Probably I made a mistake when doing "last minute changes" just before the release". Sorry for that. I will correct the problem and upload a new version.
I have created CONTRIB-4315 tracker issue to keep track of the problem and published a new corrected version (1.11). As I expected it was only a 1 word change.Stupid mistake and not well tested code from me. Sorry for the inconvenience.