STEM educators should be aware that there are three different LEGO EV3 sets:
(1) LEGO toy EV3 set (Amazon #31313)
(2) LEGO EV3 set (LEGO #54544)
(3) LEGO EV3 set with software (LEGO 992123)
If you have questions or comments, please email them directly to me, firstname.lastname@example.org.
If you are an educator, the most useful set is Set (3), because both the graphical software and the rechargeable battery are important in a classroom environment. You can get (1) through Amazon. You can get (2) and (3) through the LEGO education website.