Join award winning teacher Jonathan Bergmann as he explains how to lessen earthquake damage..This video was made for his 9th grade students.
|Uploaded with TubeShack [ Ссылка ]
Ещё видео!
Join award winning teacher Jonathan Bergmann as he explains how to lessen earthquake damage..This video was made for his 9th grade students.
|Uploaded with TubeShack [ Ссылка ]