You do not give the cognitive ranges of these children, so I will answer this question with the assumption that they may be delayed.
Here are some ideas:
To teach emotions/feelings/ or use of adjectives and adverbs consider this children's therapy toy- KIMOCHIS. They are engaging characters and interactive. Also, they are very bright and "user friendly". Here is a video that explains about their purpose for therapy and in the classroom use: http://www.youtube.com/watch?v=MXqalRKrf60
Also, sign language (especially the fingerspelling/ manual alphabet aspect) can help with spelling, math problems, recalling information through the use of a hands on activity to assist with memory and for general communication.
Good luck and hope this helps.
Louise Sattler, NCSP
Nationally Certified School Psychologist
Owner of Signing Families
Teaching children with Autism can prove challenging at times. It is great that you are looking into new strategies for how to best teach children with Autism.
Children with Autism may have trouble communicating with the teacher and classmates in a reciprocal fashion. This may pose a difficulty to learning, as students with Autism may have difficulty conversing. It is important for teachers to repeat instructions as needed, and to provide students with both written and verbal material. You can read more about this in the following article, Autism: Learning Approaches: http://www.education.com/reference/article/Ref_Autism_Learning/
An instructional strategy, no matter what type of child it is for, is HOW you will teach something. Describe what it it you are trying to teach first (what are your objectives) and then we could help you figure out a strategy.