Across West Africa, science laboratories are shared, under-equipped, or reserved for the weeks before an exam. A class of forty watches one titration. The reagents run out. The practical paper then asks students to describe, in detail, a procedure most of them have never carried out with their own hands.
Elementa is the practical you can repeat. Not a video, not a diagram — an experiment you perform, get wrong, and perform again, as many times as you need, on the phone already in your pocket. Get a step wrong and you see what going wrong looks like, and why that run cannot go into your result.
Built for the WAEC syllabus, by someone who sat it.