# Algorithms & Data Structures · 1

[Agila University track](https://edu.agilaos.com/track.php?track=26&lang=en)

About 15 minutes per lesson. Predict, run, change, explain, then complete the check in University.

- [Lesson 1: Count the work in a search](lesson-1/lesson.html)
- [Lesson 2: Use a queue when order matters](lesson-2/lesson.html)
- [Lesson 3: Binary search needs an invariant](lesson-3/lesson.html)