Remember: A bug is a mistake in the steps, never in the robot. There are three kinds: mixed-up steps, a missing step, and a number that is off.
Read and answer
Read the story, then answer.
Three days, three bugsBo runs the juice stand at the school fair. Maya's steps say: pour the juice, put the cup down, hand it over. On day one, Bo pours first, and there is no cup yet. Splash! The juice runs across the table. Ms. Park says Bo did exactly what the steps told him, so the mix-up is in the steps: they were in a mixed-up order. On day two Maya swaps the cards, but now the pour step is missing, and Bo hands over an empty cup. On day three Maya has typed the pour five times instead of once, and the cup overflows. On the last day the line is long, and every cup comes out full.
1
On day one Bo follows these steps and juice runs across the table. Which kind of bug is it?
The steps are in a mixed-up orderA step is missingA number is off
2
On day two Bo hands over an empty cup. Which kind of bug is it?
The steps are in a mixed-up orderA step is missingA number is off
3
On day three the cup overflows. Which kind of bug is it?
The steps are in a mixed-up orderA step is missingA number is off
4
Bo is the one who made the mess.
TrueFalse
5
All three kinds of bug are mistakes in the , never in Bo.
stepscupsjuice
6
Steps can always be fixed, so Maya knows where to look.
TrueFalse
Sort the bugs
7
Join each robot's bug to the kind of bug it is.
1paint goes on before the brush is picked up
2a lamp has no step to switch it on
3a robot walks ten steps, not two
Amixed-up order
Ba number that is off
Ca missing step
8
Put the juice stand's fixed steps in order.
Pour the juice
Hand it over
Put the cup down
9
Circle every one that is a bug.
Painting before the brush is picked upA door that is opened and then shutA lamp with no step to switch it onA robot that stops when its steps end
10
Mix-up to fix: Maya's day three program pours five times. Which change fixes it?
Keep one pour card and take out the other fourAdd five more pour cardsTake out the put the cup down card
11
Stretch: Maya takes the four extra pour cards out of the seven. She has cards left.
12
Ask a grown-up for three steps to make a sandwich. Swap two steps, leave one out, or change a number. Write which kind of bug you made.
13
Draw Bo handing over a full cup on the last day.
Scan the code at the top to mark this sheet on screenTake a photo of your answers or type them. It is marked for you automatically, and your score is kept.
Answer key · Set A
The juice stand bugs
1The steps are in a mixed-up order Pour came before the cup was down, so Bo did the steps in the wrong order.
2A step is missing The pour step was missing, and Bo could not do a step nobody wrote.
3A number is off The pour was typed five times instead of once. The number is off.
4False Bo did exactly what the steps told him. A bug is a mistake in the steps.
5steps Bo only follows the steps he is given.
6True Check the order, the gaps and the numbers.
71-A, 2-C, 3-B Painting too soon is an order bug. No switch-on step is a missing step. Ten steps, not two, is a number that is off.
82, 3, 1 The cup goes down first, then the juice is poured once, and then the cup is handed over.
9Painting before the brush is picked up, A lamp with no step to switch it on Paint before the brush is an order bug, and no switch-on step is a missing step. A door that shuts and a robot that stops when its steps end are doing what they should.
10Keep one pour card and take out the other four The number of pours is off. One pour fills one cup.
113 7 - 4 = 3: the cup card, one pour card and the hand-it-over card.
12Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.