Final answer:
For a client with left-sided weakness, teaching them to put the right arm into their shirt first utilizes their stronger side, enhancing their ability to dress independently.
Step-by-step explanation:
A client with left-sided weakness should be taught to put his right arm into his shirt first. This technique allows the person to use their stronger side to manage the clothing item, facilitating dressing with greater ease and independence. For those with left-sided weakness, it's important to adapt dressing techniques that compensate for the reduced function on the affected side.