ACT Aspire Exam--How much of a predictor are these results?

My child is a freshman and just received his results from the ACT Aspire exam he took in September of his freshman year. His scores are all over the place. Does anyone have feedback about how this may or may not predict his future ACT score? It seems to me that he was tested on a lot of subject matter that he has not yet learned (science and math particularly).

@kanfly not very predictive. Really only helpful as a way of getting some exposure to testing. Take a practice act test at home prior to junior year for a better indicator. Then you can decide if additional study or test prep would be helpful.