I build something similar in Claude and trialled it last term Lee but I am stuck on a few spacing questions. When I teach a concept it’s recorded and put into a pool of concepts. Each day it chooses the 4 concepts ready (or how many are due) and they put in as my do now before our maths lesson (I teach grade 4, 40 kids in the class) Concepts are always tested the next day. If under 50% of the class gets it wrong (it’s all done on mini whiteboards) it gets a 0, 50-90% a 1 and 90%+ gets a 3. I’ve trialled different spacing calculations but I’m currently working on 0s get a 0.2 on their scheduled interval (if it’s been 10 days and they get a 0 it comes back in 2 days after a quick little reteach on the spot), 1s have a +1.4 on their scheduled interval (sometimes they are overdue) an 2s have a +2.0 space on their actual elapsed days, not scheduled interval. How does your learning engine calculating spacing and how are the concepts being scored?