Content
@
0 reply
0 recast
0 reaction
7040.eth š©
@jn
Who learnt math with this in the classroom?
5 replies
0 recast
6 reactions
Lawal Mujeeb
@ancestose
What's this?
1 reply
0 recast
0 reaction
7040.eth š©
@jn
This is an overhead projector. You put a transparent paper on it, and it project whatever is written by hand on the wall. Maybe it's still in use today?
1 reply
0 recast
0 reaction
