Drill down
Let’s look at an example from the Accountability page:

Notice the Tooltip over 2006 data point indicates that 62.1% of All Students were proficient and above in 2006 within this district as a whole

Drill down to the detail level of a chart’s data by double-clicking on the chart area data point (2006 in this example)

Accountability Dashboard’s Percent Proficient and Above Chart Drill-Down