The Viafocus library
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Beginner
MathematicsGrades 3, 4, 5
The Number That Wouldn't Share — What is a prime number, and why can't you split it into equal rows?
11 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
ScienceGrades 4, 5, 6
Thin Ice — What is pressure?
11 questions · 7 min
VViafocus
Beginner
ScienceGrades 4, 5, 6
It Never Came Closer — Why is summer hotter?
14 questions · 10 min
VViafocus
Beginner
HistoryGrades 4, 5, 6
The Wall That Spoke — how did we learn to read Egyptian hieroglyphs?
11 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
ScienceGrades 4, 5, 6
The Fog Bell — What is resonance, and why does timing beat strength?
11 questions · 12 min
VViafocus5.0
Intermediate
ScienceGrades 4, 5, 6
Åttan på vaxkakan — hur fungerar bidansen och hur talar bin om var blommorna finns?
15 min
VViafocus4.0
Intermediate
ScienceGrades 5, 6, 7, 8, 9
The Showcase
12 questions · 12 min
VViafocus5.0
Beginner
ScienceGrades 4, 5, 6
Trettio man springer — varför sjönk Vasa, och vad är tyngdpunkt?
14 questions · 10 min
VViafocus
Beginner
ScienceGrades 4, 5, 6
One Stick — Why are triangles the strongest shape, and why do bridges and towers use them?
13 questions · 12 min
VViafocus5.0
Beginner
ArtGrades 4, 5, 6
It Goes On Forever — What is a vanishing point, and how does one-point perspective work?
15 min
VViafocus