I’ve often used the scientific method in my English and Social Studies classes — both with English Language Learners and with mainstream students.
The MCREL blog just posted a nice related piece titled Generating and Testing Hypotheses is Not Just for Science that’s a good short read.
It is nice to know that you make a mention of the use of scientific method in the English language instruction whereas some notable experts like Jack C. Richards think as not grounded in the ELT literature (Prof. Richards talked a bit about this in an international conference in Solo, Indonesia in 2014). Coincidentally, Indonesian curriculum applied at the moment promotes the use of the method. Unluckily as Prof. Richards has argued, I only found 1 source that deals with it, but it was written a long time ago by Marchand (1929) under the title “Teaching modern languages the scientific method”. Therefore, if you may have some other sources to recommend, please kindly share some of them with me. Thanks.