Have you heard of the “Rule of 7?” It’s a simple guideline for creating clearer, more accessible slides:

• No more than ~7 lines per slide
• No more than ~7 words per line

While not a strict rule, this approach helps reduce cognitive overload, making content easier to process—especially for individuals with invisible disabilities such as ADHD, learning disabilities, or fatigue.

However, modern best practices go a step further. Rather than focusing on counting words or lines, aim for:

• One main idea per slide
• Minimal text supported by spoken explanation
• Clear and unique descriptive slide titles (e.g., “Mineral composition influences density”)
• Supplemental materials (notes field, transcripts, or handouts) for full detail

By prioritizing clarity over quantity, you create slides that are more engaging, inclusive, and effective for all learners.