The student must be assessed in all areas related to the suspected disability including, where appropriate, health and development, vision (including low vision), hearing, motor abilities, language function, general ability, academic performance, self-help, orientation and mobility skills, career and vocational abilities and interest, and social and emotional status. A developmental history should be obtained, when appropriate. [34 C.F.R. Sec. 300.304(c)(4); Cal. Ed. Code Sec. 56320(f).]