Exactly, it picks up those children who might not be EHC eligible but still need some help. And Sonia is right, at least one teacher will need to be trained as there are weekly quick whole-class activities so that the kids can bring what they have learned back into the classroom to generalise the new skills.
It does include a screener which LSAs will be able to use after the training with the children that the teacher/SENCo have concerns about. You get a RAG rating (green = no intervention, yellow = Talk Boost and red = possible SALT referral) which acts as a baseline for the progress tracker.