School teacher help

Hi @MaryB83 I am the communications manager at my children's school and I have often been asked to draft a letter to explain a staff member's absence/extended leave etc.
You have many options and some of these will be informed by any precedent of what's been done at your school before, or maybe whether or not your school wants to set a precedent, if they haven't send out this kind of communication before. I suggest talking to your Head of School or Principal and finding out what they're comfortable with. If you regularly communicate with parents via email and you're happy to send something out about your situation, you could write it in your own voice, explain what you're going through in whatever 'tone' you're happy to use and let them know that you are happy for them to 'spread the word' in the school community so that you don't have to explain what's going on at every school drop-off.
This is an opportunity for you to control the dialogue. Kids will tell parents that you're not around and parents will wonder why - nip it all in the bud before people start talking about it and getting the information wrong. I've always found that being open, honest and transparent in school communication removes conjecture and rumour and that it's always better to be proactive rather than reactive with communication.
I'm so happy to look over a draft or help you write something if you need a hand - you're welcome to send me a private message any time. 
Wishing you all the best,
Yvette xxx

I set up (actually, hubby did) a blog on WordPress.  It really is the easiest way to keep everyone informed without going into details all the time.

I personally had a private fb blog that  I invited work colleagues and friends into. I know if someone who had 2. A more general update one. Then a more personal one that included photos etc. I did want people to know how hard it all was but you soldier  on regardless. I found by people knowing...nobody whinged about picking up workloads etc. And were supportive when I was unable to come back initially at full capacity.

@primek - from memory had a blog or similar

Fellow staff are fantastic and super supportive- I'm more concerned about letting everyone in the school know. We're a really close knit school and I don't want to hide what's happening, I just don't know what's appropriate. I don't want to explain what's going on at every school drop off pick up..

I work at my older kids' school and have been very open, including sharing my blog details with other staff. The school has been amazingly supportive of both me and the kids.  My youngest is at primary school and I contacted both her teachers last year and this year (I was diagnosed just before the end of the school year).  I also made sure that my kids felt okay about sharing the info with friends and as a result have had contact with other parents re: diagnosis.  One of the things I talked about with my kids was that their friends or others may say things that were insensitive without realising and if something upset them they should immediately talk to a teacher and to me.

I was quite open within my school community but then I teach secondary girls so that may be different. I thought it was important for teenage girls to know about issues such as this. I also received an enormous amount of support from the school and staff. Couldn't have done it without them.
Having said that, my daughter was in prep at the time but even there, the wider school community knew, too. They were also supportive and then my daughter felt free to talk about what her mum was going through, too.