close the app
student input
show the right answer
practice
wrong
good enough？
open personal page
open notification page
open one course
Yes
watch video(P)
answer question
right
add a post？
Intelligent Tutor assess and give feedback
open the app
No
community?
Nofification?
courses page
edit a post
read a post
Read statistics and records
read new message
watch mini-lecture
choose a challenge level
take courses?
complete a task
watch video(NP)
right?
Personal page
open comminity page
