| answer | Question answer options | 
| available_tutorials | List available tutorials | 
| debug_exercise_checker | An Exercise Checker for Debugging | 
| 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_quiz | 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 | Knitr quiz print methods | 
| learnr-package | learnr: Interactive Tutorials for R | 
| mark_as_correct_incorrect | Mark submission as correct or incorrect | 
| mock_exercise | Mock a learnr interactive exercise | 
| one_time | Wrap an expression that will be executed one time in an event... | 
| question_checkbox | Checkbox question | 
| question_methods | Custom question methods | 
| question_numeric | Number question | 
| question_radio | Radio question | 
| question_text | Text box question | 
| 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 | 
| safe_env | Safe R CMD environment | 
| tutorial | Tutorial document format | 
| tutorial_html_dependency | Tutorial HTML dependency | 
| tutorial_options | Set tutorial options | 
| tutorial_package_dependencies | List tutorial dependencies | 
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