## Teach KS3 Students About Selection Sort, Save Hours of Prep!

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### Frequently Asked Questions About KS3 Selection Sort

#### What is selection sort?

Selection sort is a simple sorting algorithm that repeatedly selects the smallest or largest element from an unsorted portion of the list and places it in the correct position in the sorted portion of the list.

#### How does selection sort work?

Selection sort repeatedly selects the smallest element from the unsorted portion of the list, and places it at the beginning of the sorted portion of the list. Then it selects the next smallest element, and so on, until the entire list is sorted.

#### What is the time complexity of selection sort?

The time complexity of selection sort is O(n^2) in the worst and average case, and O(n^2) in the best case.

#### What are the advantages and disadvantages of selection sort?

Advantages: Selection sort is simple to understand and implement. It also requires a small amount of memory. Disadvantages: Selection sort has a high time complexity in the worst and average case, making it inefficient for large data sets.

#### When would you use selection sort?

Selection sort is not commonly used in practice because of its poor performance on large data sets. However, it can be useful in situations where the data set is small and the goal is to teach basic sorting concepts or to implement in a low-resource device.