#. login as admin/teacher #. create a lesson, #. set 'Provide option to try a question again' to yes #. set 'Display default feedback' to yes #. add shortanswer question #. tick on 'options' to use regular expression #. on answer 1 section, enter the following string: 'it's blue, white(,| and) red/i' #. save page #. preview the question and answer it with either one of these correct answers: 'it's blue, white, red' or 'it's blue, white and red' The above answers should be recognize as the correct answers. For more info regarding correct answer with regular expression: http://docs.moodle.org/20/en/Short_answer_analysis