Recommendation: Recommended.
Description: Bar-swapping with speed control animation or step-through control. Also has an 'I'll Try' mode where viewers are asked to select what bars will be swapped.
Evaluation: The bar-swapping presentation is reasonable, but this could have been done better to be clearer about the sub-array being processed. What makes this AV stand out is the 'I'll Try' mode. Here, the user must demonstrate understanding about how the algorithm works by choosing the values to swap. The only flaw is that there is no pseudocode or other explanation of the algorithm, so the user has to come to this exercise with some other source of information about the algorithm.