Every individual who applies for the HLTA status will compile a portfolio which is individual to themselves. No two people support the same lesson or the same students. Your portfolio is the extra evidence that compliments the writing up of your tasks and is used in conjunction with these and the interviews are the basis for your assessment. If you take a lesson you would include your planning documents any notes you made of meetings with teachers prior to the lesson, copies of IEP's of any students. Lesson Plan, resources examples of students work, modification of resources for SEN or Able and Talented, seating plans, observation by others of your lesson to name but a few. You should have a mentor in school and if this is a problem the people who have taken you through the three days training will be more than willing to offer advice. Evidence can be from the last 12 months to the date you are entered for assessment. So anyone who is thinking of applying save every piece of evidence you can, make sure you write up any planning notes from meetings anything you think may be useful, save a copy of everything. It is much easier to weed out than to scurry round trying to find evidence.