The source linked under each graph says "No significant change in fourth-grade reading scores across student groups compared to 2015" and "No change in score gaps among selected racial/ethnic groups in reading at grade 4 compared to 2015".
If OP thinks removing a certain demographic changes the results they should state what demographic that is.
The article isn't using the graphs to talk about a difference between 2015 and 2017, but about the overall level, so it would indeed be surprising if there had been a large change between those years.
But there are several demographic variables that show substantial differences between groups (and sometimes over longer timescales within a group), so I think it would be more enlightening to look at all of them, rather than letting someone pick their preferred comparison and then trying to argue with that.
What demographic? Do you have a link to or some additional information about the data source? Or are you just speculating?
The source is linked under each graph in the article.
The source linked under each graph says "No significant change in fourth-grade reading scores across student groups compared to 2015" and "No change in score gaps among selected racial/ethnic groups in reading at grade 4 compared to 2015".
If OP thinks removing a certain demographic changes the results they should state what demographic that is.
The article isn't using the graphs to talk about a difference between 2015 and 2017, but about the overall level, so it would indeed be surprising if there had been a large change between those years.
But there are several demographic variables that show substantial differences between groups (and sometimes over longer timescales within a group), so I think it would be more enlightening to look at all of them, rather than letting someone pick their preferred comparison and then trying to argue with that.