Please read and agree to the
terms and conditions
of this site.
I agree
Stream
/tech
Clear filters and search
Format
photo
Tags
crowdsourcing
2
×
internet properties established in 2011
social networking language education websites
apps
business
duolingo
education
smartphone
What
app
company
2
×
duolingo
language
learning
2
×
new
2
×
today
accessible
ahn
aims
anybody
called
card
class
creator
dime
environment
expands
experience
flash
founded
gets
help
history
ios
launch
launches
learn
lonely
long
longer
luis
maps
memorization
million
people
popular
realized
recaptcha
science
Language
Current search:
crowdsourcing
×
new
×
learning
×
company
×
{{ ::tile.facetWhoCard }}
{{ ::tile.pubDate | moment: 'fromNow'}}
Paste
[[item:{{::tile.id}}]]
to render this photo inside an other item's description.
PROCESSING
TRANSCODING
ERROR
EXTRACTING
ERROR
{{::tile.title}}