You do not need an account to complete the Hour of Code activities in Kodable. However, you can create a free teacher account and add all your students.
Here are some of the benefits to setting up an account:
Allow your students to save progress and continue later after CS Ed Week.
Access to download a certificate with each student's name on it.
Access to more lesson plans and levels to teach your class about coding.
View student progress and assign more levels to your classes
View vocabulary and descriptions of each concept students are learning