The Viafocus library
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Beginner
MathematicsGrades 4, 5, 6
Three and a Bit — Why is pi 3.14, and what is pi actually measuring?
28 questions · 15 min
VViafocus3.0
Beginner
ScienceGrades 4, 5, 6
Wake the Needle — What is a magnet, and how does a compass work?
26 questions · 15 min
VViafocus
Beginner
ScienceGrades 4, 5, 6
Nobody Leads — How do thousands of birds fly in one flock without crashing?
12 min
VViafocus
Beginner
GeographyGrades 4, 5, 6
The Map Lied — Why does Greenland look as big as Africa on a world map?
13 questions · 12 min
VViafocus5.0
Beginner
ScienceGrades 4, 5, 6
Six Nights — Why do you have to finish your antibiotics even when you feel better?
11 questions · 9 min
VViafocus3.0
Beginner
Physical EducationGrades 4, 5, 6
Beat the Flag
21 questions · 12 min
VViafocus
Beginner
ScienceGrades 4, 5, 6
Thin Ice — What is pressure?
11 questions · 7 min
VViafocus
Intermediate
OtherGrades 4, 5, 6
Who Really Won? — How votes get counted, and why the rule can change the winner
24 questions · 14 min
VViafocus
Beginner
OtherGrades 4, 5, 6, 7
Five Ways to Lift a Piano
15 min
VViafocus
Beginner
MathematicsGrades 3, 4, 5
Who Moved the Cake? — How do detectives solve a mystery by ruling out what can't be true?
18 questions · 12 min
VViafocus
Beginner
OtherGrades 4, 5, 6
Two Stickers — Is 50% off then 20% off really 70% off?
11 questions · 8 min
VViafocus
Beginner
OtherGrades 4, 5, 6
Heartbeat Boat — Why do rowers need a drummer?
12 questions · 8 min
VViafocus5.0