Tutorpip← About this lessonABCHide the answer keyDownload PDF
Coding · Ages 8+ · Set A
Bo fills the jug
Scan to mark
on screen
A
Name
Date
Start Finish
Goal: 15 min
Score/ 13
Remember: A counting loop repeats a set number of times. Repeat until keeps going until something becomes true, and it checks every time round.

Read and answer

Read the story, then answer.

The lemonade stallAt the school fair, Mina and Teo needed a jug of water for the lemonade stall. Bo had a cup and a tap. Mina's first program said repeat ten times: scoop a cup and pour it in. But the jug held only six cups, so in went cup seven and water splashed across the table! Counting needs you to know the number, said Grandpa Joe, and he showed her repeat until. Now Bo scooped, poured and looked, again and again. At cup six Bo looked, nodded and stopped, and not one drop spilled. Next morning Teo rolled in a huge barrel, and the same program still worked. This time it took fifteen cups.
1
The jug holds six cups. With repeat ten times, which cup made the water splash across the table?
Cup sixCup tenCup seven
2
Repeat until checks the jug every time round.
TrueFalse
3
A repeat until loop stops when something becomes .
tentrueempty
4
Look at the program. What does Bo do right after he pours the cup in?
Scoop another cupLook at the jugStop at once
5
Teo rolls in a huge barrel that holds fifteen cups. What must Mina do to the repeat until program?
Change it to repeat fifteen timesNothing, it still worksChange it to repeat six times
6
A counting loop is the best choice when you do not know the number.
TrueFalse

Loops, order and fix

7
Join each loop to how it stops.
  1. 1repeat ten times
  2. 2repeat until the jug is full
  3. 3Bo looks at the jug
  • Astops after ten, whatever happens
  • Bstops when the check says yes
  • Cthe check, made every time round
8
Put one end of the pouring in order.
  • The jug is full, so the loop stops
  • Bo looks at the jug
  • Bo pours it in
  • Bo scoops a cup
9
Circle every job that is a repeat until.
🎨stirring paint until it is smooth👏clapping 5 times🔔knocking until someone answers⭐drawing 6 stars
10
Teo's train program says repeat five times, move one piece of track. The track is longer than five pieces. Which program always stops at the station?
Repeat until at the stationRepeat five timesRepeat eight times
11
Mina's first program was repeat ten times. What is the mix-up to fix?
Make the jug biggerPour fasterChange it to repeat until the jug is full
12
The same repeat until program works for a small jug and a big barrel.
TrueFalse
13
The track is now twelve pieces long, and the train program says repeat five times, move one piece. How many pieces of track are still ahead when it stops?
7175
14
Write a repeat until for something you do at home, such as stirring pancake batter.
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
Bo fills the jug
1Cup seven The jug was full after six cups, so the very next cup, cup seven, spilled.
2True Bo scoops, pours and looks, again and again, so he checks each time.
3true Repeat until keeps going until its check becomes true.
4Look at the jug After pouring he looks at the jug to check if it is full, and only then goes round again.
5Nothing, it still works Repeat until the barrel is full checks each time, so it works for a jug or a barrel of any size.
6False Counting needs you to know the number. Repeat until works when you do not.
71-A, 2-B, 3-C A counting loop stops at its number. A repeat until loop stops when its check becomes true, and it looks every time round.
84, 3, 2, 1 Bo scoops, pours and looks, and when the look says full the loop stops.
9stirring paint until it is smooth, knocking until someone answers Stirring and knocking go on until something happens, and you do not know how many times. Clapping 5 times and drawing 6 stars are counted.
10Repeat until at the station Repeat until at the station checks each time, so it works for any track.
11Change it to repeat until the jug is full Repeat until the jug is full checks the jug each time, so Bo stops when it is full, whatever size the jug is.
12True It checks each time, so it does not need to know the number.
137 The train moves 5 pieces on a track of 12, so 12 - 5 = 7 pieces are left. It never checks where the station is.
14Your own words: a grown-up reads it.
Mark each answer, count the right ones and write the score on the sheet.