Currently documentation for the algebra question type is at http://docs.moodle.org/19/en/Algebra_question_type and http://docs.moodle.org/20/en/Algebra_question_type
It would be best if it was at http://docs.moodle.org/19/en/question/type/algebra and http://docs.moodle.org/20/en/question/type/algebra because these are the links created by Moodle and wich are dispayed in the footer of the question creation screen.
Of course this is only a minor improvment but it would help to maintain only the documentation in MoodleDocs and just refer to these pages in the README.
Of course you would also need to modify the record for the algebra questiontype in the module & plugins database !
The version for Moodle 2.1 is nearly ready.
Thanks a lot for this wonderfull question type.