AI lesson planners promise to cut planning time from hours to minutes. But they’re not all equal. I tested three popular options with the same lesson requirements to see which actually delivers.

The Test

I asked each tool to create a 5th-grade science lesson on the water cycle, aligned to NGSS standards, with differentiation for three levels.

MagicSchool AI

Output quality: Excellent. The lesson included a clear objective, warm-up, direct instruction, hands-on activity, and assessment — all aligned to the specific standard I requested. Differentiation was meaningful, not just “give advanced students harder questions.”

Best feature: 60+ AI tools beyond lesson planning — quiz generators, IEP goal writers, rubric creators. It’s a full teaching toolkit.

Price: Free tier (limited), Pro at $9.99/month.

Diffit

Output quality: Good for reading-focused lessons. Diffit’s strength is adapting texts to different reading levels — it takes any article or passage and creates versions for multiple Lexile levels with comprehension questions.

Best feature: The text leveling is genuinely useful for differentiation. Upload any text and get 3-4 reading level versions instantly.

Limitation: Less useful for math, science labs, or project-based lessons. It’s really a reading differentiation tool, not a full lesson planner.

Price: Free tier (generous), Pro at $6/month.

Curipod

Output quality: Good for interactive, engagement-focused lessons. Curipod creates slide-based lessons with built-in polls, word clouds, and drawing activities. Think Nearpod meets AI.

Best feature: Student engagement tools built into the lesson. Students participate on their devices during the lesson.

Limitation: The AI-generated content sometimes needs significant editing. The engagement features are great but the academic rigor varies.

Price: Free tier, Pro at $7.50/month.

Which One to Choose

Need	Choose
Full lesson planning + teaching toolkit	MagicSchool
Reading differentiation	Diffit
Interactive, engagement-focused lessons	Curipod
Budget-conscious	Diffit (best free tier)

Or use all three — they’re cheap enough that $20/month for all three is still less than one hour of your time.

Which One Should You Start With?

If you’re new to AI lesson planning, start with MagicSchool. It has the lowest learning curve and the free tier is generous enough to test properly.

If you already use AI and want more control over the output, Diffit is worth trying — especially for differentiation.

If you want engagement-focused activities and don’t mind a narrower feature set, Curipod fills a specific niche well.

The Free Alternative: ChatGPT

All three tools are essentially wrappers around AI with teacher-specific prompts. You can get similar results with ChatGPT using detailed prompts:

“Create a [duration] lesson plan for [grade] [subject] on [topic]. Include: learning objective aligned to [standard], warm-up activity (5 min), direct instruction (10 min), guided practice (15 min), independent practice (10 min), and exit ticket. Differentiate the independent practice for 3 levels: below grade, on grade, and above grade.”

The dedicated tools save time on prompting and formatting. ChatGPT gives you more flexibility. Most teachers end up using both.

Related reading: MagicSchool vs Diffit vs SchoolAI · Gemini vs ChatGPT vs Claude for Teachers · AI Differentiated Instruction

🛠️ Try our free alternative: Lesson Plan Generator — no signup, no subscription.