The average teacher spends between 7 and 10 hours per week on lesson planning. Let that number sit for a moment. That's a full extra workday — every single week — spent on one task. For most teachers, it's the task that eats into evenings and erases weekends.
Here's what's interesting: the teachers who plan fastest don't plan worse. In fact, the research on lesson planning suggests that excessive time spent on planning is often a symptom of starting from scratch too frequently — not a sign of thoroughness. The most experienced, most effective teachers tend to plan faster because they've built systems that mean they're never starting from nothing.
That's the key insight this guide is built around: fast lesson planning isn't about cutting corners. It's about not rebuilding the same foundation every single week.
Why lesson planning takes so long — and it's not because you're doing it wrong
Before we talk about going faster, it's worth being honest about why this task is so time-consuming in the first place. Because the problem isn't usually efficiency — it's structure.
Most teachers plan slowly because they're working without an architectural foundation. Every week, they open a blank document (or a fresh planner page) and start asking: What am I teaching this week? What comes before and after? How does this connect to what students already know? What activities would work for this concept? What materials do I need to create?
These are the right questions — but they're the wrong time to be asking them. These questions should be answered once, at the start of the year, inside a long-range plan and unit framework. When they're answered weekly, you're paying the cognitive cost of curriculum design every single time you plan a lesson. No wonder it takes hours.
For most teachers, slow lesson planning is a curriculum architecture problem disguised as a time management problem. The fix isn't to plan faster — it's to plan in the right order, at the right level of detail, at the right time of year.
The 4-step fast lesson planning framework
This framework is how experienced teachers — and teachers using systems like Simple Mondays — consistently plan a full week of lessons in under an hour. It works because it separates the architectural work (done once, annually) from the execution work (done weekly, quickly).
Build your long-range plan before September
Your long-range plan is the skeleton of your teaching year. It maps curriculum expectations to months, identifies natural unit breaks, and gives you a clear through-line from September to June. This investment — typically 3 to 5 hours if done well — eliminates the "what am I teaching this week?" question for the entire year. If you're an Ontario teacher, your long-range plan should reference specific curriculum expectations by strand and grade.
Map each unit before you teach it
Two weeks before a unit begins, spend 30 to 45 minutes mapping it out at a high level: what's the big idea, what are the key lessons, what's the culminating task, what materials will you need? This unit-level planning means that when you sit down for weekly planning, you're filling in details — not making decisions. The difference in mental load is significant.
Plan the week in one sitting, from the unit map
With a solid unit map in place, weekly planning becomes tactical rather than strategic. You already know what you're teaching — now you're just deciding how. Block 30 to 45 minutes on Thursday afternoon or Friday morning, open your unit map, and fill in the week. Use templates for your lesson structure so you're not reinventing format every time.
Generate resources from your plan, don't build them separately
Resources — worksheets, graphic organizers, slides, activity sheets — should flow out of your lesson plan, not be a separate creation task that happens after planning is "done." If your planning tool can generate resources aligned to your lesson, this step takes minutes. If you're creating manually, batch your resource creation immediately after weekly planning so the context is still fresh.
"The fastest planners aren't planning faster — they're doing the thinking at the right level at the right time."
Templates and tools that cut planning time in half
The single highest-leverage habit change most teachers can make is moving from blank-page planning to template-based planning. A good lesson template means you're answering the same structural questions every time — learning goal, success criteria, hook, instruction, practice, assessment — without having to reconstruct the format from scratch.
Here's what a before-and-after looks like for a typical week:
- Open blank doc, stare at it
- Spend 20 min deciding what to teach
- Research curriculum expectations
- Build lesson structure from scratch
- Search Google for worksheet ideas
- Edit generic ChatGPT output for 45 min
- Total: 3–4 hours per week
- Open Simple Mondays, see week's curriculum focus
- Generate lesson outlines (5 min)
- Review and adjust (10 min)
- Generate week's resources (10 min)
- Schedule and finalize (5 min)
- Total: 30–40 minutes per week
