This website lets you work on Faded Parsons Problems, a type of programming exercise where you rearrange blocks of code and fill in blanks to create a working program. You can learn more about Faded Parsons Problems in Nate Weinman's CHI 2021 paper.

The problems hosted here are all in Python 3 and checked for correctness using doctests.

Here's a (non-comprehensive) list of the problem hosted here:

• greater_num (Conditionals)
• hello_world (Conditionals)
• assign_grade (Conditionals)
• count_evens (Loops)
• count_multiples (Loops)
• average_scores (Loops+Lists)
• concatenator (Loops+Lists)
• double_time (List Mutation)
• sum_grid (Nested Lists)
• contains_15row (Nested Lists)
• count_unread_books (Dicts)
• plant (Classes)
• movie_purchase (Classes)
• player (Classes)
• clothing (Classes)

If you're a teacher and would like to host your own problems, check the Github repository for more instructions.