First of all, to be assigned with the proper school since your transfer, have the district's Unitedstreaming administrator login to the admin portal and have them move your name (account) from previous school to the new school.

Second, when you are logged into your account and view the "My Content" material you should see a drop down window to the right of each item saved.  Within that drop down window, you should see the option "Share".  Select this option.  A pop-up window should occur and let you select it to be shared with a school or district.  Depending on how the admin has setup this function, the "Share" option may have to be approved first.

I hope this helps.  Please let me know if iI can be of any further assistance.