I've been looking into this for a year and a half and had planned to embark on a course starting in September. I have the full support of my headteacher. I found a distance learning provider with a course starting in May which I would be happy to take on. I sent the details to the Head and she said she's happy for me to start in May if I feel ready, but I may wish to do some further preparation work and start in September.
If you've done the NASENCO award, what (if any) preparation did you do and how did you know you were ready?