On the Understanding Language website, locate a resource that provides guidance to mathematics teachers on supporting students' language development within mathematical sense-making. Identify the full title of this resource and briefly describe its purpose.
Navigate to the 'Resources' page. Scroll down to view all available resources. Locate the resource related to mathematics curricula and language development. Identify the full title of this resource. Extract the description of its purpose.
Successfully navigate to the 'Resources' page. Identify the resource titled 'Principles for the Design of Mathematics Curricula and MLRs'. State that its purpose is to provide guidance to mathematics teachers for recognizing and supporting students' language development processes in the context of mathematical sense making.