# Demoing a Lesson

You can start the current lesson you’re working on with the demo_lesson() function without going through any of swirl’s menus. You can also start the lesson at a specific question by specifying the question number. For example demo_lesson(from = 6) will start the lesson at the sixth question. If you don’t know the number of a question and you’d rather not count through each question in your lesson you can use the find_questions() function which will return the corresponding question numbers that match a regular expression that you provide.

# Testing a Lesson

You can test that the general syntax and structure of the current lesson is correct using the test_lesson() function. If you wish to test every lesson in the course you are currently working on you can use the test_course() function. Using either function will print messages to the R console about fixes that need to be made to your lesson.