Draw a net for a rectangular prism with length (L), width (W), and height (H).

Let's assume a rectangular prism with length $L = 5$ cm, width $W = 3$ cm, and height $H = 2$ cm.

Draw a rectangle representing the base of the prism. Its dimensions will be $L \times W$.

Attach four rectangles to the sides of the central base rectangle. These will be the lateral faces.

• Two rectangles will have dimensions $L \times H$ (e.g., $5 \text{ cm} \times 2 \text{ cm}$).
• Two rectangles will have dimensions $W \times H$ (e.g., $3 \text{ cm} \times 2 \text{ cm}$). Arrange them alternatingly around the base. For example, attach a $5 \times 2$ rectangle to one $5 \text{ cm}$ side, a $3 \times 2$ rectangle to a $3 \text{ cm}$ side, another $5 \times 2$ to the opposite $5 \text{ cm}$ side, and another $3 \times 2$ to the remaining $3 \text{ cm}$ side.

Attach one more rectangle to any of the $L \times H$ or $W \times H$ side faces. This will be the top face, and it must have the same dimensions as the base: $L \times W$ (e.g., $5 \text{ cm} \times 3 \text{ cm}$). A common way is to attach it to one of the $L \times H$ faces.

Label all the sides of the rectangles with their corresponding lengths ($L$, $W$, or $H$). For our example:

• The base and top rectangles will have sides labeled $5 \text{ cm}$ and $3 \text{ cm}$.
• The two larger side rectangles will have sides labeled $5 \text{ cm}$ and $2 \text{ cm}$.
• The two smaller side rectangles will have sides labeled $3 \text{ cm}$ and $2 \text{ cm}$.

The net will look like a cross shape or a series of rectangles laid out flat, ready to be folded into a prism.