If you are logging into different accounts from the same computer, it is recommended that you set up different Chrome profiles. This will keep all your accounts separate. Here is a video to walk you through the steps.
Here are step-by-step directions to remove an account from a Chrome Profile. It is very helpful to have each profile contain only one account.
MyCIS - instructions
Account Creation - instructions
Making bookings - instructions
Activating Your Parent Account - instructions
Accessing Your Child's Information - instructions
Difference between Parent and Student Accounts - instructions
Mobile App Installation for Parents and Students - instructions
Setting Up Notifications - instructions
Account creation & Parent guide - instructions
How to Access Progress Reports in PowerSchool - instructions
Students logging into Seesaw - instructions
Seesaw overview and families your child - instructions
Accessing work from previous years - instructions
Student login to IXL - instructions
Students logging into Mathletics - instructions