There are a couple of differences between the online version of the software and the offline version for this lesson. I don't know if this is by design or if it has been overlooked. Firstly, the "Expert" Level is no different from Level 1. The offline version did not give any factors as clues, and I think this is crucial. I want students to be able to think about the two factors without already having one given. This is how they learn to solve quadratic equations. Secondly, I notice there are a lot of "repeats" in the charts, and as far as I can tell, the previous offline version avoided this.
Thanks Damian. We'll look into this. Duncan