- if
We make choices
We make choices every day. The word if starts a choice. If it is raining, we take an umbrella.
The bell rings if part Line up do part The if part and the do part
A rule has two parts. The if part is what we check. The do part is what we do. If the bell rings, line up.
Raining: take it Not raining: leave it When it is not true
Sometimes the if part is not true. Then we skip the do part. It is not raining today. So we leave the umbrella at home.
- else
Else means if not
Else tells us what to do instead. If it is sunny, play outside. Else, read a book. It is raining, so we read a book.
- if the way right is blockedmove downelsemove right
The robot follows rules too
Robots use rules to choose. This robot asks: is the way right blocked? A rock is there, so it goes down. Press Run to watch.
For parents
Goal: Your child learns that a rule has an if part and a do part, and that else means if not, do this instead.
- Make rules at home together, like: if your plate is empty, you may leave the table.
- Ask: which part is the if part? Which part is the do part?
- In the labs, your child sorts rain and sun rules, then gives the robot its own if rule. Ask what the rule says before pressing Run.
Away from the screen: Play a game: if I clap, you jump. Else, stand still. Then let your child make up a rule for you to follow.