🧩 Block coding, Grade 5 · session 4 of 14 · 60 minutes · ⭐ Plus
Programs can make choices. An if block checks something, like "is there a path to the left?", and runs its blocks only when the answer is yes. If/else gives a second plan for when the answer is no.
A complete lesson · 60 minutes
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Grade 5 · ages 9 to 11 · beginner
Warm-up · think first
You check first, then decide. If yes: umbrella. If no: you just go. That check is an if.
Teacher tip: Ask three more if-questions about the room: if the light is on, wave; if you have a pencil, hold it up.
Part 1 of 3 · learn, see, practise
An if block asks a yes or no question.
If the answer is yes, the blocks inside run. If no, they are skipped.
In the maze, Byte can check: is there a path ahead, to the left, or to the right?
Byte walks along and must turn up at the corner. How does it know when?
Answer: repeat until ⭐: move forward; if path to the left: turn left
Start with the warm-up and go as far as you can. The stretch questions are meant to be hard.
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FAQ
A block that asks a yes or no question and runs its blocks only when the answer is yes.
An if with a second part that runs when the answer is no, so exactly one of the two always runs.
In the Classic Maze, if appears around puzzle 14 and if/else around puzzle 18; puzzle 20 ends with a certificate.
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