You have to click on "Save and assign later", then when you want to assign it, go to "manage" and then assign.  It's really kind of a pain and should be changed to let it assign or release by a certain date.

So I found that out the other day....but what I am really wanting is to actually select the assignments and post them let's say on Tuesday to open on Friday.  That way I don't have to go back in on Friday and assign them.

Is that possible?

I completing agree!  As I plan the week, say in Google Classroom, it allows you to edit the posting date and time the assignment appears in the students' view.  Super helpful for planning and organizing purposes!   If K.A. would also include this feature, teachers could plan ahead and not need to go back later to simply assign it in the moment when students need to work on it.  Please consider adding this option that contributes to efficiency and time management!

Agreed!  I am using Google Classroom to announce the Khan material and typically set out my week days in advance.  It would be a great feature of Khan Academy if they could do a delay post date so i didn't have to (remember to) come back on to assign it!

Hi everyone!

I'm happy to say that the ability to set assignment start dates is now available!

For more information on this update, please see the following announcement:

https://support.khanacademy.org/hc/en-us/community/posts/4408197910029-Update-New-teacher-assignment-features-available-this-week