The Observable Language Behaviours continua describe ELLs' English proficiency development in three broad strands-oral, reading, and writing. Each strand is guided by the Ontario language curriculum. The Oral strand is defined in terms of listening and speaking skills. Reading is organized by the elements: meaning, form and style, and fluency. The Writing strand emphasizes the view of writing as a process, progressing from prewriting and organization of ideas, to writing and editing.
The Observable Language Behaviours continua have two main purposes: one is to inform programming and the other is to track the student's language proficiency.
For further information on the OLBs refer to the STEP - A Guide for Users document