answer                  Question answer options
available_tutorials     List available tutorials
correct                 Mark submission as correct or incorrect
disable_all_tags        Disable all html tags
duplicate_env           Create a duplicate of an environment
event_register_handler
                        Register an event handler callback
external_evaluator      External execution evaluator
filesystem_storage      Filesystem-based storage for tutor state data
finalize_question       Finalize a question
format.tutorial_question_answer
                        Formatting and printing quizzes, questions, and
                        answers
get_tutorial_info       Get information about the current tutorial
get_tutorial_state      Observe the user's progress in the tutorial
initialize_tutorial     Initialize tutorial R Markdown extensions
knit_print.tutorial_question
                        Knitr quiz print methods
one_time                Wrap an expression that will be executed one
                        time in an event handler
question_checkbox       Checkbox question
question_numeric        Number question
question_radio          Radio question
question_text           Text box question
question_ui_initialize
                        Custom question methods
quiz                    Tutorial quiz questions
random_phrases_add      Add phrases to the bank of random phrases
random_praise           Random praise and encouragement
run_tutorial            Run a tutorial
safe                    Execute R code in a safe R environment
tutorial                Tutorial document format
tutorial_html_dependency
                        Tutorial HTML dependency
tutorial_options        Set tutorial options
tutorial_package_dependencies
                        List tutorial dependencies