Here are step-by-step instructions for changing a password for another user via j2dashboard:
Log in to Just2easy using your staff/admin credentials.
Load j2dashboard (now found in Teacher's area) from your launchpad
Navigate to the Manage Users tab.
Select the user/s from the list. (you can reset for multiple users at the same time).
Click the Reset Password button.
Enter your existing password, and a new password for the user (twice). You can stipulate whether a user is required to change their password upon logging in (recommended if resetting for another teacher)
Click ok to save the changes.