In my Educational Psychology class, I gave a presentation on constructivism, showing the difference between minimal guidance, and guided instruction, and evidence that inquiry-based approaches are ineffective. The professor lauded me with praise afterward and said it really got her thinking, plus she really was intrigued with Singapore Math (which I used as examples of explicit and guided instruction).
A few minutes later, I overheard her saying to a student in the class:
“Direct instruction works well in the short term but there’s research that shows that over the long term, students who were taught with discovery learning retained more. They also did better on standardized tests over the years than students taught with direct instruction.”
But I got an A on the presentation.
UPDATE: I contacted the professor to ask what particular research she was referring to. Her response follows:
There isn’t just one study that shows this – there are several studies in different contexts. You can read about them synthesized here in the National Academies Press book, How People Learn – https://www.nap.edu/catalog/9853/how-people-learn-brain-mind-experience-and-school-expanded-edition
This book can be downloaded, which I have just done. Will let you know if I find anything of interest; stay tuned.