Hello. We do sticky all Q&As to the top of Active Convos (as well as in their Topic) while we're collecting questions and then again when the answers come in. We also usually stick something about them (with a link) in the Mumsnet Latest box (in blue on the right).
Tee, have you got Stickies enabled in your Customise options?
And at me not reading properly and seeing that you hide Pre-school Education.
If you hide a topic, any threads created there won't appear in Active for you - even if we sticky them.
However, we nearly always put Q&As in the MN Latest box (to the right, in blue), so you could keep an eye on that instead. Also, we always mention ongoing Q&As in our Parenting News email every week - have you subscribed?