To ensure the IEP team is on the same page as to what mastery of an objective looks like, the person writing the objective can take two steps:

provide an example problem that would be used to assess mastery (and the example problem would have the same language as used in the objective)

provide an example of a response to the example problem cited above that would be considered mastery level work

The graph below is not data. A graph is a representation of summary statistics. This summarizes the data.

The chart below does not show the actual prompts, e.g. what number was shown to Kate, but it does show the individual trials. This is data, with a summary statistics at the end of each row. Here is a link to more discussion about data, with an example of a data sheet I use.

The data shown below addresses the student’s effort to solve an equation. Problem 21 is checked as correct and the error in problem 22 is identified. I can use this data to identify where the student is struggling and how to help. NOTE: the math objective would use the same verb as the problem: solvethe linear equation.

The excerpt of a data sheet, shown below shows trials in a student’s effort to compare numbers.

Data below shows a student’s effort to evaluate integer expressions.

This applies to all areas beyond math. The chart above or the data sheet I linked above show data sheets that indicate the prompt and the results, with notes. For example, if I am asking my son to put on his shoes, each row of the data sheet is a trial with the outcome and notes.