You can learn about writing instruction for students with significant cognitive disabilities through the DLM Professional Development Modules. The modules you want to look for include:
Module 12: Writing: Text Types and Purposes
Module 16: Writing with Alternate Pencils
NOTE: This module is especially important if you have students with significant motor impairments.
Module 26: Writing Information and Explanation Texts
NOTE: In the DLM Assessment System, all students are asked to write information or explanations texts. If you are unsure how to get started, this module will help.
Module 29: Emergent Writing
NOTE: In the DLM Assessment System, there are conventional writing testlets and emergent writing testlets at every grade level. If your students are not yet using letters to spell words to generate texts, they are emergent writers.