Planning a lesson only you know how to teach
Teachers often design lessons built on personal routines, references, or shorthand that only make sense to them. These plans might work seamlessly in a familiar classroom, but for a substitute, they quickly unravel. A sub cannot replicate your classroom culture or anticipate your mid-lesson pivots.
Common pitfalls include using acronyms only your team knows, expecting the sub to know which students need extra time, or leaving out explanations for everyday tools you use. For example, your "Bellwork" routine might involve a certain handout and a timer, but unless you spell this out, the sub faces confusion right from the start.
To avoid this, write your sub plans as if for a new teacher seeing your room for the first time. Include details about routines, transitions, and expectations. Make sure the plan works even if the sub has never met your class before.
Keep reading: What a Teacher Absence Costs: Sub Pay, Fill Rate, and Coverage Stipends
Leaving a seating chart from the first week of school
Classrooms change fast. If your seating chart is two months old, the sub will spend the day calling the wrong names and misidentifying students. This causes unnecessary disruption and delays, especially for attendance or behavior management.
Many teachers forget to update the chart in the sub folder after seat swaps, student withdrawals, or the arrival of new students. If your chart still shows a student who moved away, or misses a new arrival, nobody wins. Knowing where to find students with specific needs, like allergy accommodations or reading supports, depends on an accurate chart.
Before you leave for the day, print or upload the latest seating chart. Double-check that every student is listed, and the arrangement matches how the desks look that morning. If you use flexible seating or rotate groups, explain the system clearly. A simple note like "tables rotate after lunch" helps the sub keep order while you're away.
Assuming the sub can log in to anything
Many districts now expect subs to use digital tools for attendance, slides, or assignments. But access can be a hurdle. Some districts issue guest accounts to subs, but these might not work on every platform. Others do not provide any login at all.
Leaving instructions that say "take attendance in the portal" or "run slide deck on the projector" assumes the sub has access. If they cannot log in, the plan falls apart. Even if a sub has credentials, they may not know your password or which app the class uses for spelling practice.
Whenever possible, provide a printed backup for anything digital. If attendance is online, attach a paper roster. For assignments, leave hard copies in a prominent spot. If you want the sub to show a video or slideshow, provide clear, step-by-step instructions for how to access it, or save it to a USB drive labeled for the day. The more analog your backup, the smoother the handoff.
Keep reading: Substitute Credential Rules by State and Where They Are Heading
Burying the schedule inside a paragraph of prose
Many teachers write beautiful, thoughtful notes to their subs, explaining the flow of the day in story form. But when the bell rings or a student asks "Is it snack time?", the sub needs a schedule they can scan fast. Buried in prose, the plan is hard to follow.
Paragraphs describing transitions, routines, and exceptions force the sub to pause and reread. If the schedule is hidden in the third paragraph, key times get missed. This creates confusion and adds stress for both the sub and students.
Instead, include a clear, bulleted or tabulated schedule at the very top of your sub plan. List times, activities, and locations. If your day changes for an assembly or early dismissal, highlight this in bold or underline it. A quick-glance schedule helps a sub stay on track and keep the class calm.
No plan for the student who refuses to work
Every classroom has at least one student who tests boundaries, especially with a new adult in the room. Many sub plans focus on the compliant majority and forget to address what to do when a student simply shuts down or disrupts the class.
Leaving out guidance for challenging behavior puts the sub at a disadvantage. The sub will either ignore the problem, which can escalate, or overreact, which can lead to greater disruptions. Either way, learning time is lost for everyone.
Who needs a heads-up?
Identify students who need extra support or are likely to resist work. Give the sub strategies that work for you, such as offering choices, using a calm-down corner, or involving a neighboring teacher. List the location of any behavior charts, reward systems, or passes students use to take a break. If you have a protocol for calling the office or sending for help, spell it out in the plan.
When you provide specific steps, the sub is ready to respond. This keeps the day productive and prevents situations from getting out of control.
See how ChalkHandoff handles this for k12 education
Forgetting specials, recess duty, and dismissal groups
Specials like art, music, or PE often run on a separate schedule, and subs may not know where to take the class. The same goes for recess duty assignments and dismissal routines. Many teachers forget to mention these details, thinking they are obvious or handled by others.
If the sub is unsure where to go or when, the class may arrive late, miss an activity, or get left unsupervised. Dismissal groups can be especially tricky, with some students taking the bus, others picked up, and a few walking home. If instructions are missing, even an experienced sub can lose track of who goes where.
Always list specials and duty assignments separately, with times and locations. For dismissal, include a roster or checklist showing how each student gets home. If badges or notes are required for pick-up, give the sub clear instructions. This prevents last-minute chaos and helps everyone get home safely.
Filling the day with busywork the class finishes by ten
When pressed for time, it is tempting to fill the sub plan with worksheets or low-level review activities. The problem comes when students finish all the work before lunch. A full day's worth of packets can take a well-behaved group less than an hour. This leaves the sub scrambling to keep the class occupied and on task.
Idle time breeds discipline problems and leaves students disengaged. The purpose of a sub plan is to keep the class working and learning, not just to keep them busy. If you only leave busywork, students may see your absence as a free day, and it can take several days to get routines back on track when you return.
Building in depth and flexibility
Include a mix of independent work, group activities, and options for early finishers. Provide extra reading or enrichment materials for students who finish quickly. If possible, design assignments that build on current units so the day moves learning forward. Include clear instructions for what to do when work is done, such as silent reading, journal writing, or partner games. The right balance keeps the class engaged and minimizes downtime.
Giving the sub no way to tell you what happened
Many teachers return to a brief note or checklist from the sub, but some forget to leave any way for the sub to communicate. Without a structured feedback form or a place to jot notes, the sub might skip sharing important information. You might miss out on hearing about a student who was especially helpful, a problem with an assignment, or a safety concern.
If there is no prompt, some subs will leave a note on the board or desk, but others will move on quickly to their next job. You lose the chance to address issues right away or recognize positive behavior. This can create gaps in your own follow-up with students and colleagues.
What does the teacher need to know?
Leave a feedback form with prompts for attendance, behavior, assignments completed, and any notable events. Ask for specifics, such as who struggled or who excelled. Include space for additional comments. If the sub used materials from a certain folder, have them note what was taken or left. This helps you hit the ground running when you return, and lets you address issues while they are still fresh.
Reusable sub plan templates can make this step easier. Some teachers use digital tools that bundle the plan, seating chart, and feedback form in one place. This gives the sub everything they need for a smooth handoff and helps you recover lost instructional time after an absence.
