Professional development and lesson plans are not add-ons in the U.S. market. They are purchase criteria.
One of the most consistent surprises for companies entering the U.S. K-12 market from outside and sometimes from within, is the depth of teacher support that U.S. schools expect at the point of purchase. Not after implementation. Not as an optional service tier. At purchase, as part of what they are evaluating when they decide whether to buy.
We have seen good products lose evaluations not because the content was weak or the platform was unreliable, but because the teacher support package was thin. A curriculum director who loves the instructional approach but cannot see a clear professional development plan and a set of standards-aligned lesson plans will not champion your product to their evaluation committee. The absence of robust teacher support signals to U.S. educators that the company does not understand how their classrooms actually work.