Tk20 will be unavailable from 10:00 pm CDT on April 24 to 7:00 am CDT on April 25, 2014 due to scheduled maintenance for edTPA portfolio transmission. You will not be able to log in during this time. Please address any questions to your System Administrator or contact Tk20 Customer Support at firstname.lastname@example.org. Also, Internet Explorer Users: The latest version of Tk20 requires IE 10 or IE 11. If you are using an older version of Internet Explorer, please update your browser as soon as possible or use Chrome or Mozilla Firefox. Please address any questions to your System Administrator or contact email@example.com.