1
general::
Phrase(s): put something into practice
to make a suggested procedure the actual procedure. • That is a good policy. I suggest you put it into practice immediately. • I plan to put the new technique into practice as soon as I can.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Also, put in practice. Carry out in action, as in It's time we put these new ideas into practice. Shakespeare used this idiom in Two Gentlemen of Verona (3:2): "Thy advice, this night, I'll put in practice." [Mid-1500s]
American Heritage Idioms