As you being to work with your students on executive functions, it will be important to determine what strengths and what struggles students are currently having. There are many online resources to have students fill out questionnaires or for you to evaluated. I will list a few of them below.
Questionnaire -- can be modified to meet your needs
Some other ideas include creating your own Google Form to collect data or having students do a 3-2-1 journal entry. A journal entry could be 3 things I am really good at and enjoy about school, 2 things I have always struggled with during school and 1 thing I am willing to change about they way I learn.