Follow the instructions given below:
Step 1: Login to your Splash Math teacher account.
Step 2: Go to the "Roster" tab. Find the student whose picture password you want to edit from the list. Click on the "Edit" link.
Step 3: You will see a pop-up. Click on "Change password?".
Step 4: Select your desired picture password. Click on "Select".
Step 5: Click on "Save Details".
You have successfully edited the picture password. Repeat the steps for other students.