Upload date
All time
Last hour
Today
This week
This month
This year
Type
All
Video
Channel
Playlist
Movie
Duration
Short (< 4 minutes)
Medium (4-20 minutes)
Long (> 20 minutes)
Sort by
Relevance
Rating
View count
Features
HD
Subtitles/CC
Creative Commons
3D
Live
4K
360°
VR180
HDR
582,437 results
Students learn what a variable is and the importance of building an experiment with just one variable. More science fair project ...
46,979 views
9 years ago
Students develop their ideas into testable questions that follow the format, 'How does INPUT affect OUTPUT?' More science fair ...
61,521 views