I know, right? When my wife mentioned this, that was the first thing I said: there are plenty of fields where the research has life-or-death consequences and they use control groups. Education, by comparison, is low stakes.<p>In medical research they have procedures and statistical techniques to detect significant results and allow for early stoppage. There&#x27;s no reason the same techniques couldn&#x27;t be applied to education research.<p>But you need control groups, or you don&#x27;t actually know that you&#x27;ve made an improvement!