FURTHER READING ONE: Principles and procedures of materials development.

He also mention, in a summarised way, that materials should:

Tomlinson’s "informative base" consists of six core principles for language acquisition.

The objective of the chapter was to establish SLA-based principles to underpin materials development.

The reading recommended here give us an idea of how this has been done by arguably the most active and influential materials development practitioner in the field, Brian Tomlinson.

Tomlinson offers a "compilation of learning principles and procedures" considered to contribute to successful language learning, based on the recommendations of teachers and SLA researchers.