An interesting and engaging lesson idea that explores the concept of algorithms can be found here. This lesson, developed by the Digital Technologies Hub, helps students to consider the role of sequencing in their everyday lives. Students write their own set of instructions for an activity of their choice (maximising ownership of the task) and are encouraged to share their sequence in a digital format.
Questioning strategies could focus on student understanding of the importance of decomposition in creating these sequences. Subsequent activities could then involve a game where students are required to follow a set of instructions, or even creating their own game for their peers.
Side note: The Digital Technologies Hub website is a great resource for teachers who want to improve their own digital literacy and become more effective teachers of Digital Technologies!