We often talk about CLASS observers and observation data as being reliable. But, what does reliable really mean? And, why do we make such a big deal about it?

Let’s start with the first question: What does reliable mean?

According to Google’s dictionary, reliable means “consistently good in quality or performance; able to be trusted.” To say that someone is reliable is to say that you can count on that person to do the job right every time.

The job of the CLASS observer is to watch and listen for the presence and absence of specific, behavioral interactions defined by the CLASS measure, take notes on these interactions, and use the CLASS Manual to assign numerical codes for each of the CLASS dimensions based on what was observed. We can count on reliable observers to consistently assign codes that are accurate and fair.

After attending a two-day observation training, CLASS observers must prove their reliability by passing an initial certification test and then passing a recertification test each subsequent year. Teachstone strongly recommends that observers engage in periodic calibration as well to ensure ongoing reliability and confidence with the tool. Double coding and talking about nuances of the tool with colleagues are great ways to keep your head in the game, too.

Now, let’s tackle the second question: What’s all the hoopla all about?

If you think about it, the importance of CLASS reliability is obvious. After all, isn’t reliability important in other aspects of life? You want a reliable babysitter watching your kids, a reliable doctor treating your illnesses, and a reliable friend who’s there for you in times of need, right? Likewise, the education world wants and needs reliable observers conducting their CLASS observations. Important and high-stakes decisions about accreditation, funding, and professional development are made based on CLASS observations and depend on high-quality data, so it’s critical that the observers conducting them be reliable.

So all you reliable CLASS observers out there—be proud of yourself; you’ve worked hard to achieve and maintain this status. Just don’t forget that with great power comes great responsibility (that’s right! I’m giving you the same advice given to a superhero). Because your job is so important and the data you collect is so impactful, you have an ongoing responsibility to stay reliable and do your job right. But, don’t worry—you’re not alone in this! All of us here at Teachstone are here to support you every step of the way. We like to think of ourselves as your trusty sidekicks.


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