It's done! And ahead of schedule... (for once!)
A fully revised 2026 version of the Risps PDF eBook is now available for free, from
www.risps.co.uk
and from Payhip.
payhip.com/b/RGKPF
An early Ch-risp-mas present?
With best wishes of the season,
Jonny
Unexpected email from Jonny Griffiths telling me there's a new 2026 update of his RISPS book, that's great investigations for impressionable A Level students. Download it now from www.risps.co.uk with links to Geogebra and Excel files
@jonny-griffiths.bsky.social
Worked hard on a big revision of my risps. Weeding out mistakes, making tasks clearer, writing Geogebra and Excel files, all with better navigation; look out for the free eBook coming out in January!
Found this task somewhere on the net recently. I have an answer but my method is a bit tortured! Does anyone have a nice technique for this?
Nicely done, Rufus...
Hi Dominic, thriving this end in retirement, wishing you well, Jonny
Delighted to hear it! Jonny
Hi Rufus - glad you like the Risps. I am retired now and enjoying it! Jonny
Can you show c = (ab+1)/(a+b)?
Dipping my toe into this Blue Sky thing...
Hello! Anybody out there?
Jonny
