Enhancing Functional Skills in Children with Multiple Disabilities

Last updated on:

March 12, 2026

For a child with multiple disabilities, something as routine as washing hands or asking for a glass of water can present a significant challenge. The goal of special education in these cases is not to work around these difficulties – it is to directly address them through structured, evidence-based strategies that build genuine independence. At the heart of this effort are functional skills: everyday abilities that allow a child to communicate, take care of themselves, and participate meaningfully in social life. Two of the most powerful tools educators and therapists use to build these skills are Task Analysis and Augmentative and Alternative Communication (AAC).

What are functional skills, and why do they matter?
Task analysis: breaking learning into manageable steps
Slicing steps for children with severe disabilities
Data collection and monitoring progress
Augmentative and alternative communication (AAC)
Unaided AAC: using the body to communicate
Aided AAC: external tools for expression
Choosing the right AAC system
Integrating task analysis and AAC in daily instruction

What are functional skills, and why do they matter?

Functional skills are the abilities needed for daily living – the kind of skills that, if a person cannot perform them independently, someone else must perform for them. According to the U.S. Department of Education’s guidance under IDEA, functional performance broadly refers to skills and activities that are not academic in nature but are central to routine activities of everyday living. These include self-care (such as dressing, eating, and personal hygiene), communication (expressing needs and responding to others), mobility, safety awareness, and social interaction.

For children with multiple disabilities, these skills do not develop automatically or incidentally. They must be explicitly taught, practiced repeatedly across different settings, and embedded into a child’s daily routine. This is why the Individualized Education Program (IEP) is so central to the process. The IEP must document a child’s current levels of functional performance and set measurable goals that reflect the individual child’s needs, strengths, and life context. The ultimate objective is not just skill acquisition in isolation – it is participation: in the home, the school, and the wider community.

Nine broad categories of functional skills are commonly addressed in special education IEPs, spanning behaviour regulation, communication, self-care, mobility, safety, and social participation. For children with multiple disabilities, educators typically prioritise the skills most critical for quality of life and independence at that particular stage of development, rather than trying to address everything at once.

Task analysis: breaking learning into manageable steps

Task analysis (TA) is one of the most well-established instructional strategies in special education. It works by breaking a complex skill or routine into very small, clear, sequential steps, allowing the student to learn one piece at a time instead of being overwhelmed by the whole task at once. Teachers use it for life skills, self-care routines, social skills, and even academic tasks like solving multi-step math problems.

Consider the task of handwashing. For most people, this is automatic. But for a child with multiple disabilities, it involves a chain of distinct actions: turning on the tap, adjusting the water temperature, applying soap, scrubbing for the right duration, rinsing, and drying. A task analysis breaks the skill or routine into its component parts and creates consistent routines that the child can practise across different settings and with different people – a process known as generalisation.

Slicing steps for children with severe disabilities

For children with more severe disabilities, even the individual steps of a standard task analysis may be too large to teach effectively. In such cases, educators use a process sometimes called “slicing” – further subdividing each step into even smaller micro-steps that the learner can realistically attempt and succeed at. Task analysis has been shown to be effective for addressing communication, motor, adaptive, social, and academic outcomes across learners of varying ability levels, which is why it is considered an evidence-based practice by major organisations including the National Professional Development Center on ASD.

Once the steps are defined, teachers choose a chaining method to teach them. In forward chaining, instruction starts with the first step and moves forward through the sequence. In backward chaining, the child is guided through all the steps but independently completes the last one first – building toward the front of the chain over time. A third approach, total task presentation, involves teaching the entire sequence in every session, with prompts and reinforcement provided at each step. The method chosen should reflect the learner’s style, strengths, and how reinforcing they find the end product of the task.

Data collection and monitoring progress

A critical feature of task analysis is that it makes progress visible and measurable. Teachers track which steps a student completes independently, which require prompting, and which are still not achieved – using checklists or data sheets for each session. This data informs IEP reviews, guides instructional adjustments, and helps the entire team (including paraprofessionals and parents) provide consistent support. Visual aids, such as picture cards for each step, can further support students who need additional scaffolding during the learning process.

Augmentative and alternative communication (AAC)

Communication is foundational to all functional skill development. A child who cannot reliably express their needs, choices, or discomfort faces barriers not just in learning, but in every aspect of daily life. This is where Augmentative and Alternative Communication (AAC) becomes essential.

The American Speech-Language-Hearing Association (ASHA) defines AAC as all forms of communication other than oral speech used to express thoughts, needs, wants, and ideas. Research across multiple systematic reviews confirms that AAC interventions for children with intellectual and developmental disabilities increase functional communication skills, improve language and social competence, and can enhance natural speech in some individuals. Critically, the right to communicate through any mode is protected under the UN Convention on the Rights of Persons with Disabilities, making AAC a matter of both clinical practice and human rights.

Unaided AAC: using the body to communicate

Unaided AAC systems require no external equipment – they rely entirely on the communicator’s own body. These include gestures, facial expressions, vocalizations, eye gaze, and manual sign language. For a child who can use their hands with some control, sign language or a set of functional signs (such as signs for “more,” “stop,” “help,” or “eat”) can provide an immediate and always-available communication option. Unaided methods are particularly important as a backup system – a device or communication aid may not always be available in every situation, so learning unaided methods ensures a child is never without some means of expression.

However, unaided methods do have limitations. They require adequate motor control and depend heavily on whether the communication partner knows how to interpret the child’s signals. For children with very complex motor or cognitive profiles, unaided methods alone may be insufficient.

Aided AAC: external tools for expression

Aided AAC systems use external supports to facilitate communication. These range from low-tech to high-tech options. Low-tech tools include communication boards with symbols, picture books, and object-based systems; high-tech tools include Speech Generating Devices (SGDs) – dedicated communication devices or tablet-based apps (such as Proloquo2Go) that produce spoken output when the user selects a symbol or types a word.

One widely used low-tech aided system is the Picture Exchange Communication System (PECS), which teaches children to initiate communication by physically exchanging a picture card for a desired item or action. Research comparing PECS to speech generating devices found no significant difference in communication outcomes, suggesting that the right system depends on the individual child rather than on the technology level of the tool. In practice, AAC interventions should always be multimodal, utilising the child’s full communication capabilities including any residual speech, gestures, signs, and aided communication – not one system in isolation.

Choosing the right AAC system

Selecting an AAC approach is not a one-size-fits-all decision. Assessment should consider the child’s vision, hearing, motor abilities, cognition, literacy skills, and current communication modes, as well as the contexts in which they need to communicate. Importantly, there are no specific prerequisites – such as minimum cognitive level or age – required before starting AAC. Waiting until a child reaches a certain developmental milestone before introducing AAC is not supported by current evidence and may delay critical communication development.

The motivation and preferences of the child’s family and social network also play a major role. Research on speech-language pathologists working with children with severe and multiple disabilities found that the family’s motivation sometimes weighs even more heavily in clinical decision-making than the child’s own abilities alone – underscoring how critical it is for families to be active partners in AAC planning and implementation.

Integrating task analysis and AAC in daily instruction

Task analysis and AAC are not parallel strategies – they work together. When a child is working through the steps of a self-care routine using a task analysis, AAC symbols or signs can be embedded directly into each step to build communication alongside the functional skill. For example, a child learning to wash their face might also learn to signal “done” or “help” at each stage. This integration ensures that communication development is not siloed into a separate therapy session but is woven into every learning opportunity throughout the day.

Consistency is essential for both strategies. Skills need to be practised across varying settings and with different people so that the child can apply them in any relevant situation – a process called generalisation. A child who can wash their hands only at school, only with one teacher, has not yet fully acquired the skill. The goal is for functional skills and communication strategies to travel with the child into the home, the community, and eventually into adult life.

Reinforcement, visual supports, and a predictable routine all support this process. And critically, the skills targeted should be meaningful to the individual child and their family – rooted in real-life contexts and cultural relevance, not generic checklists.

What do you think? How might the way we sequence functional skill goals in an IEP reflect or overlook a child’s cultural and home environment? And given that children with multiple disabilities often communicate in very subtle, idiosyncratic ways – what role do families play in helping educators recognise and build on those early communication attempts?

References

PDF 📄

Enhancing Functional Skills in Children with Multiple Disabilities

Table of Contents

What are functional skills, and why do they matter? 🔗

Task analysis: breaking learning into manageable steps 🔗

Slicing steps for children with severe disabilities 🔗

Data collection and monitoring progress 🔗

Augmentative and alternative communication (AAC) 🔗

Unaided AAC: using the body to communicate 🔗

Aided AAC: external tools for expression 🔗

Choosing the right AAC system 🔗

Integrating task analysis and AAC in daily instruction 🔗