If you zoom in, you can read what those abbreviations mean and it’s all different math expressions. So I guess it’s something else that just reminds people of a periodic table. Also the word “maths” can be read on the poster, so another indication that this is not a periodic table…
It’s photoshopped![image of Boris Johnson in a school](https://discuss.tchncs.de/pictrs/image/b4799d1c-918e-441e-91c8-95c02506a2d7.png)
Weird “periodic table”.
If you zoom in, you can read what those abbreviations mean and it’s all different math expressions. So I guess it’s something else that just reminds people of a periodic table. Also the word “maths” can be read on the poster, so another indication that this is not a periodic table…