Most training programs don’t fail because adults are hard to teach. They fail because they’re still built like school — a lecture, a quiz, a completion certificate. Training adults in the workplace takes a different approach, and adult learning theory is the closest thing L&D has to a playbook for what that approach should look like.

Why This Matters Right Now

Training budgets are under a microscope, and the numbers explain why. Formal learning hours per employee actually climbed to 16.7 in 2025, up from 13.7 the year before, per ATD’s 2026 State of the Industry report — but that recovery hasn’t fixed the underlying problem. 88% of organizations are concerned about employee retention, and providing learning opportunities is their No. 1 retention strategy, according to LinkedIn’s 2025 Workplace Learning Report. Meanwhile, 86% of employees say they mostly pick up new skills by figuring things out on the job, per TalentLMS’s 2026 L&D research — which means most learning is happening outside the programs we’re building.

That gap is exactly what adult learning theory tries to close.

Understanding Adult Learning Theory

Adult learning theory, or andragogy, comes from Malcolm Knowles, who spent his career studying how adults learn differently from children. Where traditional pedagogy puts the instructor at the center, andragogy assumes every adult learner already walks in with knowledge, opinions, and a full calendar — and treats that as an asset instead of an obstacle.

Knowles broke it into 5 principles:

Does the Theory Actually Hold Up?

Andragogy is a practical framework built on classroom experience — not a lab-tested formula. It came out of Knowles watching how adults actually behaved in real training rooms over decades of practice. A 2024 academic review notes that critiques of the theory center on a lack of empirical support and the theory’s simplicity. But real practitioners know that sometimes the best solution is actually just the simplest solution. The 5 principles of adult learning theory hold up because thousands of practitioners have used them and watched them work, not because a lab confirmed them under controlled conditions. So, treat it the same way you’d treat a well-worn recipe from someone who’s cooked it a thousand times: trustworthy through experience, not theory alone.

Incorporating Learning Preferences

The 5 principles explain why adults learn the way they do. How that learning actually gets delivered is what turns the theory into results.

Mixing formats — video, text, hands-on practice — reinforces the same material through different paths, which is exactly what the “experience” and “problem-centered” principles call for: learners connect new information to what they already know, in whatever format makes that connection stick. This is why multimodal learning measurably improves retention, not just engagement — it’s giving the brain more than one way to encode the same skill.

Gamification works on the “internally motivated” principle specifically. Badges and leaderboards aren’t effective because they’re flashy — they work because they make progress visible, and visible progress keeps people engaged well past the point where a mandate alone would lose them. That’s the mechanism behind why gamification moves the needle on training completion.

Self-direction may be the principle with the most leverage, since it’s the one most directly in a learner’s control. When employees choose what, when, and how they learn, they’re more likely to finish training and actually apply it afterward. If you want to build a program around that principle specifically, we’ve laid out concrete tactics for driving self-directed learning — microlearning, blended formats, social learning, and gamification, each mapped to a specific way to hand learners more control.

Blended Learning in Practice

Blended learning — a mix of instructor-led and self-directed formats — is the most practical way to put adult learning theory into action. Here’s how to start.

1. Identify your audience

Are your learners on-site, remote, or hybrid? That answer shapes everything downstream. On-site and field-based teams need a different delivery plan than a fully remote workforce — especially if job-site access to a laptop isn’t guaranteed.

2. Use the right tools

The right tools make blended learning sustainable instead of a one-off project. BizSkills handles the skill-mapping and skill-rating side — matching content to job role automatically, so “problem-centered” isn’t just a principle on a slide, it’s built into what gets assigned. BizReady covers the hands-on side, using AI roleplay so learners practice a skill instead of just watching a video about it — which lines up directly with the “experience” and “problem-centered” principles above.

3. Measure your success

Adult learners want to know a program is working just as much as leadership does. Our practical guide to proving training ROI walks through metrics that don’t require a data science degree to pull together.

Building a Culture Around Training Adults in the Workplace

Individual programs only go so far. The organizations getting the most out of adult learning theory have built it into how they operate day to day, not just how they run a single course. If you’re thinking about that shift at the org level, creating a learning culture for a more adaptable organization is a good next read. And if you’re doing all of this solo, scaling training as a team of one has a framework built for exactly that reality.

Frequently Asked Questions