This is an example of the sheets I use to take data. Ideally I get at least 100 productions per target sound per session. The layout only allows you to track two sessions per side, but I personally find it useful to have it set up this way so that you know when the student has hit 100 productions. This layout also makes it easy to calculate the percentage of correct productions. That way, the student can see how they did at the end of the session, and chart their own progress. Hope someone finds this useful!