data templates corrected

controller/template_controller.py

@@ -5,12 +5,18 @@ five templates/*-wise template modules render from.
 Scheduling rules (dummy/demo scheduler, not a full CSP solver):
   1. General courses (shared across every batch of a session) are placed
      first, only on Tuesday, so those slots are locked in before anything
-     else and never clash across the batches sharing them.
+     else and never clash across the batches sharing them. Each general
-  2. Lab courses (180-minute / double-slot) are placed next, in lab rooms
+     offering gets `lectures_per_week` sessions.
-     only, on whichever day/slot-pair is free for the batch, instructor,
+  2. Lab courses are placed next: each offering gets `labs_per_week`
-     and room.
+     180-minute / double-slot sessions, in lab rooms only, on whichever
-  3. Remaining theory courses fill the rest of the week (Mon/Tue/Wed/Thu/Fri),
+     day/slot-pair is free for the batch, instructor, and room.
-     one 90-minute slot at a time, avoiding room / instructor / batch clashes.
+  3. Remaining theory sessions (`lectures_per_week` per non-general
+     offering) fill the rest of the week (Mon/Tue/Wed/Thu/Fri), one
+     90-minute slot at a time, avoiding room / instructor / batch clashes.
+
+Room selection always tries a course's preferred lecture_room_id /
+lab_room_id first, falling back to another same-type room only if the
+preferred one is busy for that day/slot.
 """
 
 import csv
@@ -59,22 +65,32 @@ def load_data():
     batches_26 = _read_csv(os.path.join("batch_codes", "26", "batches.csv"))
     batches = batches_25 + batches_26
 
-    courses_by_id = {c["course_id"]: c for c in courses}
+    rooms_by_id = {r["room_id"]: r for r in rooms}
-    instructors_by_code = {i["instructor_code"]: i for i in instructors}
+    instructor_names_by_code = {i["instructor_code"]: i["instructor_name"] for i in instructors}
     batches_by_code = {b["batch_code"]: b for b in batches}
 
-    # normalize offerings: expand "batch1|batch2" general offerings into a
+    # normalize courses: numeric fields + a lookup by id
-    # list of batch codes on each offering record
+    courses_by_id = {}
+    for c in courses:
+        c["credit_hours"] = int(c["credit_hours"])
+        c["lectures_per_week"] = int(c["lectures_per_week"])
+        c["labs_per_week"] = int(c["labs_per_week"])
+        c["is_general"] = c["is_general"].lower() == "yes"
+        courses_by_id[c["course_id"]] = c
+
+    # normalize offerings: expand "batch1|batch2" section batch groups into
+    # a list of batch codes, and attach the course record for convenience
     for off in offerings:
-        off["batch_codes"] = off["batch_code"].split("|")
+        off["batch_codes"] = off["batch_codes"].split("|")
-        off["is_general"] = courses_by_id[off["course_id"]]["is_general"].lower() == "yes"
+        off["course"] = courses_by_id[off["course_id"]]
-        off["course_type"] = courses_by_id[off["course_id"]]["course_type"]
+        off["instructor_name"] = instructor_names_by_code.get(off["instructor_code"], off["instructor_code"])
 
     return {
         "rooms": rooms,
+        "rooms_by_id": rooms_by_id,
         "blocks": blocks,
         "instructors": instructors,
-        "instructors_by_code": instructors_by_code,
+        "instructor_names_by_code": instructor_names_by_code,
         "courses": courses,
         "courses_by_id": courses_by_id,
         "offerings": offerings,
@@ -115,10 +131,17 @@ class Scheduler:
         self.instructor_busy.setdefault(key, set()).add(instructor_code)
         self.batch_busy.setdefault(key, set()).update(batch_codes)
 
+    def _room_candidates(self, preferred_room_id, room_pool):
+        """Preferred room first, then the rest of the same-type pool."""
+        preferred = self.data["rooms_by_id"].get(preferred_room_id)
+        rest = [r for r in room_pool if r["room_id"] != preferred_room_id]
+        return ([preferred] if preferred else []) + rest
+
     def _add_session(self, offering, day, slot_indices, room):
-        course = self.data["courses_by_id"][offering["course_id"]]
+        course = offering["course"]
         start = TIME_SLOTS[slot_indices[0]]["start"]
         end = TIME_SLOTS[slot_indices[-1]]["end"]
+        session_type = "lab" if len(slot_indices) > 1 else "theory"
         self.sessions.append({
             "day": day,
             "slot_indices": slot_indices,
@@ -126,71 +149,88 @@ class Scheduler:
             "end": end,
             "course_id": offering["course_id"],
             "course_name": course["course_name"],
-            "course_type": course["course_type"],
+            "course_type": session_type,
-            "is_general": offering["is_general"],
+            "is_general": course["is_general"],
+            "section_id": offering["section_id"],
             "instructor_code": offering["instructor_code"],
-            "instructor_name": self.data["instructors_by_code"][offering["instructor_code"]]["instructor_name"],
+            "instructor_name": offering["instructor_name"],
             "room_id": room["room_id"],
             "room_name": room["room_name"],
             "batch_codes": offering["batch_codes"],
         })
 
     def schedule_general_courses(self):
-        day = "Tuesday"
+        general = [o for o in self.data["offerings"] if o["course"]["is_general"]]
-        general = [o for o in self.data["offerings"] if o["is_general"]]
         for offering in general:
-            placed = False
+            course = offering["course"]
-            for slot_index in TEACHING_SLOT_INDICES:
+            room_candidates = self._room_candidates(course["lecture_room_id"], self.classrooms)
-                for room in self.classrooms:
+
-                    if self._is_free(day, slot_index, room["room_id"], offering["instructor_code"], offering["batch_codes"]):
+            for _ in range(course["lectures_per_week"]):
-                        self._mark_busy(day, slot_index, room["room_id"], offering["instructor_code"], offering["batch_codes"])
+                placed = False
-                        self._add_session(offering, day, [slot_index], room)
+                # Tuesday first, then spill to the rest of the week if a
-                        placed = True
+                # session can't fit there.
+                for day in ["Tuesday"] + [d for d in DAYS if d != "Tuesday"]:
+                    for slot_index in TEACHING_SLOT_INDICES:
+                        for room in room_candidates:
+                            if self._is_free(day, slot_index, room["room_id"], offering["instructor_code"], offering["batch_codes"]):
+                                self._mark_busy(day, slot_index, room["room_id"], offering["instructor_code"], offering["batch_codes"])
+                                self._add_session(offering, day, [slot_index], room)
+                                placed = True
+                                break
+                        if placed:
+                            break
+                    if placed:
                         break
-                if placed:
+                if not placed:
-                    break
+                    print(f"WARNING: could not place a lecture for general course {offering['course_id']} section {offering['section_id']}")
-            if not placed:
-                print(f"WARNING: could not place general course {offering['course_id']}")
 
     def schedule_lab_courses(self):
-        labs_offerings = [o for o in self.data["offerings"] if o["course_type"] == "lab" and not o["is_general"]]
+        offerings = [o for o in self.data["offerings"] if not o["course"]["is_general"] and o["course"]["labs_per_week"] > 0]
-        for offering in labs_offerings:
+        for offering in offerings:
-            placed = False
+            course = offering["course"]
-            for day in DAYS:
+            room_candidates = self._room_candidates(course["lab_room_id"], self.labs)
-                for slot_a, slot_b in LAB_SLOT_PAIRS:
+
-                    for room in self.labs:
+            for _ in range(course["labs_per_week"]):
-                        if self._is_free(day, slot_a, room["room_id"], offering["instructor_code"], offering["batch_codes"]) and \
+                placed = False
-                           self._is_free(day, slot_b, room["room_id"], offering["instructor_code"], offering["batch_codes"]):
+                for day in DAYS:
-                            self._mark_busy(day, slot_a, room["room_id"], offering["instructor_code"], offering["batch_codes"])
+                    for slot_a, slot_b in LAB_SLOT_PAIRS:
-                            self._mark_busy(day, slot_b, room["room_id"], offering["instructor_code"], offering["batch_codes"])
+                        for room in room_candidates:
-                            self._add_session(offering, day, [slot_a, slot_b], room)
+                            if self._is_free(day, slot_a, room["room_id"], offering["instructor_code"], offering["batch_codes"]) and \
-                            placed = True
+                               self._is_free(day, slot_b, room["room_id"], offering["instructor_code"], offering["batch_codes"]):
+                                self._mark_busy(day, slot_a, room["room_id"], offering["instructor_code"], offering["batch_codes"])
+                                self._mark_busy(day, slot_b, room["room_id"], offering["instructor_code"], offering["batch_codes"])
+                                self._add_session(offering, day, [slot_a, slot_b], room)
+                                placed = True
+                                break
+                        if placed:
                             break
                     if placed:
                         break
-                if placed:
+                if not placed:
-                    break
+                    print(f"WARNING: could not place a lab for course {offering['course_id']} section {offering['section_id']} ({offering['batch_codes']})")
-            if not placed:
-                print(f"WARNING: could not place lab course {offering['course_id']} for {offering['batch_codes']}")
 
     def schedule_theory_courses(self):
-        theory_offerings = [o for o in self.data["offerings"] if o["course_type"] == "theory" and not o["is_general"]]
+        offerings = [o for o in self.data["offerings"] if not o["course"]["is_general"]]
-        for offering in theory_offerings:
+        for offering in offerings:
-            placed = False
+            course = offering["course"]
-            for day in DAYS:
+            room_candidates = self._room_candidates(course["lecture_room_id"], self.classrooms)
-                for slot_index in TEACHING_SLOT_INDICES:
+
-                    for room in self.classrooms:
+            for _ in range(course["lectures_per_week"]):
-                        if self._is_free(day, slot_index, room["room_id"], offering["instructor_code"], offering["batch_codes"]):
+                placed = False
-                            self._mark_busy(day, slot_index, room["room_id"], offering["instructor_code"], offering["batch_codes"])
+                for day in DAYS:
-                            self._add_session(offering, day, [slot_index], room)
+                    for slot_index in TEACHING_SLOT_INDICES:
-                            placed = True
+                        for room in room_candidates:
+                            if self._is_free(day, slot_index, room["room_id"], offering["instructor_code"], offering["batch_codes"]):
+                                self._mark_busy(day, slot_index, room["room_id"], offering["instructor_code"], offering["batch_codes"])
+                                self._add_session(offering, day, [slot_index], room)
+                                placed = True
+                                break
+                        if placed:
                             break
                     if placed:
                         break
-                if placed:
+                if not placed:
-                    break
+                    print(f"WARNING: could not place a lecture for course {offering['course_id']} section {offering['section_id']} ({offering['batch_codes']})")
-            if not placed:
-                print(f"WARNING: could not place theory course {offering['course_id']} for {offering['batch_codes']}")
 
     def run(self):
         self.schedule_general_courses()

data/dummy/courses/course_offering.csv

@@ -1,25 +1,15 @@
-course_id,batch_code,instructor_code
+course_id,section_id,batch_codes,instructor_code
-CS101,25021519,1001
+CS101,A,25021519,1001
-CS102,25021519,1001
+CS201,A,25021519,1002
-CS201,25021519,1002
+CS101,B,25021520,1001
-CS202,25021519,1002
+CS201,B,25021520,1002
-CS101,25021520,1001
+EE101,A,25031519,1004
-CS102,25021520,1001
+CS101,C,26021519,1001
-CS201,25021520,1002
+CS201,C,26021519,1002
-CS202,25021520,1002
+CS101,D,26021520,1001
-EE101,25031519,1004
+CS201,D,26021520,1002
-EE102,25031519,1004
+EE101,B,26031519,1004
-CS101,26021519,1001
+GEN101,A,25021519|25021520|25031519,1002
-CS102,26021519,1001
+GEN102,A,25021519|25021520|25031519,1006
-CS201,26021519,1002
+GEN101,B,26021519|26021520|26031519,1002
-CS202,26021519,1002
+GEN102,B,26021519|26021520|26031519,1006
-CS101,26021520,1001
-CS102,26021520,1001
-CS201,26021520,1002
-CS202,26021520,1002
-EE101,26031519,1004
-EE102,26031519,1004
-GEN101,25021519|25021520|25031519,1002
-GEN102,25021519|25021520|25031519,1006
-GEN101,26021519|26021520|26031519,1002
-GEN102,26021519|26021520|26031519,1006

data/dummy/courses/courses.csv

@@ -1,9 +1,6 @@
-course_id,course_name,course_type,credit_hours,is_general
+course_id,course_name,credit_hours,lectures_per_week,labs_per_week,is_general,lecture_room_id,lab_room_id
-CS101,Programming Fundamentals,theory,3,no
+CS101,Programming Fundamentals,4,2,1,no,A-101,A-L01
-CS102,Programming Fundamentals Lab,lab,1,no
+CS201,Data Structures,4,2,1,no,A-102,A-L01
-CS201,Data Structures,theory,3,no
+EE101,Basic Electronics,4,2,1,no,A-201,A-L02
-CS202,Data Structures Lab,lab,1,no
+GEN101,Functional English,3,2,0,yes,A-103,
-EE101,Basic Electronics,theory,3,no
+GEN102,Islamic Studies,2,1,0,yes,A-103,
-EE102,Basic Electronics Lab,lab,1,no
-GEN101,Functional English,theory,3,yes
-GEN102,Islamic Studies,theory,2,yes

data/dummy/generate_dummy_data.py

@@ -69,77 +69,91 @@ def main():
 
     all_batches = batches_25 + batches_26
 
-    # ---- instructors (4-digit employee codes) ----
-    instructors = [
-        ["1001", "Dr. Ahsan Raza", "CS"],
-        ["1002", "Ms. Sana Tariq", "CS"],
-        ["1003", "Mr. Bilal Khan", "CS"],
-        ["1004", "Dr. Farah Iqbal", "EE"],
-        ["1005", "Mr. Usman Ali", "EE"],
-        ["1006", "Ms. Hira Shah", "CS"],
-    ]
-    write_csv(
-        "instructor/instructors.csv",
-        ["instructor_code", "instructor_name", "department"],
-        instructors,
-    )
-
     # ---- courses ----
-    # is_general courses are shared across all batches of the same session
+    # One row per subject: lectures/labs per week are counted separately so
-    # (so they can be scheduled together on Tuesday with no clash).
+    # a single course can carry both, and each course names its preferred
+    # lecture/lab room (the scheduler falls back to another same-type room
+    # only if the preferred one is busy).
+    # is_general courses are shared across every batch of the same session
+    # (so they can be scheduled together on Tuesday first, with no clash).
     courses = [
-        ["CS101", "Programming Fundamentals", "theory", 3, "no"],
+        # course_id, course_name, credit_hours, lectures_per_week, labs_per_week, is_general, lecture_room_id, lab_room_id
-        ["CS102", "Programming Fundamentals Lab", "lab", 1, "no"],
+        ["CS101", "Programming Fundamentals", 4, 2, 1, "no", "A-101", "A-L01"],
-        ["CS201", "Data Structures", "theory", 3, "no"],
+        ["CS201", "Data Structures", 4, 2, 1, "no", "A-102", "A-L01"],
-        ["CS202", "Data Structures Lab", "lab", 1, "no"],
+        ["EE101", "Basic Electronics", 4, 2, 1, "no", "A-201", "A-L02"],
-        ["EE101", "Basic Electronics", "theory", 3, "no"],
+        ["GEN101", "Functional English", 3, 2, 0, "yes", "A-103", ""],
-        ["EE102", "Basic Electronics Lab", "lab", 1, "no"],
+        ["GEN102", "Islamic Studies", 2, 1, 0, "yes", "A-103", ""],
-        ["GEN101", "Functional English", "theory", 3, "yes"],
-        ["GEN102", "Islamic Studies", "theory", 2, "yes"],
     ]
     write_csv(
         "courses/courses.csv",
-        ["course_id", "course_name", "course_type", "credit_hours", "is_general"],
+        [
+            "course_id", "course_name", "credit_hours", "lectures_per_week",
+            "labs_per_week", "is_general", "lecture_room_id", "lab_room_id",
+        ],
         courses,
     )
 
-    # ---- course offerings: which course is taught to which batch, by whom ----
+    # ---- course offerings: course + section (a section groups the batches
-    # General courses (GEN101/GEN102) are offered once per session (25/26)
+    # taking that section together) + who teaches it ----
-    # and shared across every batch in that session.
+    # A course can have many sections; here each CS/EE batch of a session is
+    # its own section (Section A/B/...), while general courses have a single
+    # section "ALL" grouping every batch of that session.
     offerings = []
 
-    dept_theory_lab = {
+    dept_course = {"CS": ["CS101", "CS201"], "EE": ["EE101"]}
-        "CS": [("CS101", "CS102"), ("CS201", "CS202")],
-        "EE": [("EE101", "EE102")],
-    }
     dept_instructors = {
         "CS": ["1001", "1002", "1003", "1006"],
         "EE": ["1004", "1005"],
     }
 
-    for batch_code, department, program, session in all_batches:
+    section_letters = ["A", "B", "C", "D"]
-        pairs = dept_theory_lab[department]
+    dept_section_counter = {"CS": 0, "EE": 0}
-        instr_pool = dept_instructors[department]
-        for i, (theory_id, lab_id) in enumerate(pairs):
-            instr = instr_pool[i % len(instr_pool)]
-            offerings.append([theory_id, batch_code, instr])
-            offerings.append([lab_id, batch_code, instr])
 
-    # general courses: one offering per (course, session), batch_group lists
+    for batch_code, department, program, session in all_batches:
-    # every batch code sharing that session, separated by "|"
+        section_id = section_letters[dept_section_counter[department] % len(section_letters)]
+        dept_section_counter[department] += 1
+
+        for i, course_id in enumerate(dept_course[department]):
+            instr_pool = dept_instructors[department]
+            instr = instr_pool[i % len(instr_pool)]
+            offerings.append([course_id, section_id, batch_code, instr])
+
+    # general courses: one offering per (course, session), section "ALL"
+    # grouping every batch code sharing that session, separated by "|"
     for session, batch_group in (
         ("25", [b[0] for b in batches_25]),
         ("26", [b[0] for b in batches_26]),
     ):
-        offerings.append(["GEN101", "|".join(batch_group), "1002"])
+        offerings.append(["GEN101", "ALL", "|".join(batch_group), "1002"])
-        offerings.append(["GEN102", "|".join(batch_group), "1006"])
+        offerings.append(["GEN102", "ALL", "|".join(batch_group), "1006"])
 
     write_csv(
         "courses/course_offering.csv",
-        ["course_id", "batch_code", "instructor_code"],
+        ["course_id", "section_id", "batch_codes", "instructor_code"],
         offerings,
     )
 
+    # ---- instructors (4-digit employee codes) ----
+    # Derived from the offerings above so it can never drift: one row per
+    # unique (instructor, course, section) teaching assignment.
+    instructor_names = {
+        "1001": "Dr. Ahsan Raza",
+        "1002": "Ms. Sana Tariq",
+        "1003": "Mr. Bilal Khan",
+        "1004": "Dr. Farah Iqbal",
+        "1005": "Mr. Usman Ali",
+        "1006": "Ms. Hira Shah",
+    }
+    instructors = []
+    for course_id, section_id, batch_codes, instr_code in offerings:
+        instructors.append([instr_code, instructor_names[instr_code], course_id, section_id])
+
+    write_csv(
+        "instructor/instructors.csv",
+        ["instructor_code", "instructor_name", "course_id", "section_id"],
+        instructors,
+    )
+
     # ---- students (roll_no = batch_code-seq) ----
     students = []
     for batch_code, department, program, session in all_batches:

data/dummy/instructor/instructors.csv

@@ -1,7 +1,15 @@
-instructor_code,instructor_name,department
+instructor_code,instructor_name,course_id,section_id
-1001,Dr. Ahsan Raza,CS
+1001,Dr. Ahsan Raza,CS101,A
-1002,Ms. Sana Tariq,CS
+1002,Ms. Sana Tariq,CS201,A
-1003,Mr. Bilal Khan,CS
+1001,Dr. Ahsan Raza,CS101,B
-1004,Dr. Farah Iqbal,EE
+1002,Ms. Sana Tariq,CS201,B
-1005,Mr. Usman Ali,EE
+1004,Dr. Farah Iqbal,EE101,A
-1006,Ms. Hira Shah,CS
+1001,Dr. Ahsan Raza,CS101,C
+1002,Ms. Sana Tariq,CS201,C
+1001,Dr. Ahsan Raza,CS101,D
+1002,Ms. Sana Tariq,CS201,D
+1004,Dr. Farah Iqbal,EE101,B
+1002,Ms. Sana Tariq,GEN101,ALL
+1006,Ms. Hira Shah,GEN102,ALL
+1002,Ms. Sana Tariq,GEN101,ALL
+1006,Ms. Hira Shah,GEN102,ALL

logs/template_generator.log

@@ -1,4 +1,4 @@
-Timetable generation log - started 2026-09-09T17:07:54.250382
+Timetable generation log - started 2026-09-09T17:48:16.013663
 ================================================================================
-[17:07:54] INFO: Running conflict checks (student/batch and teacher)...
+[17:48:16] INFO: Running conflict checks (student/batch and teacher)...
-[17:07:54] INFO: No conflicts found — schedule is clash-free for students and teachers.
+[17:48:16] INFO: No conflicts found — schedule is clash-free for students and teachers.

templates/batch-wise/batch_wise_template.py

@@ -37,7 +37,7 @@ def generate_batch_wise_templates(sessions, data, output_dir):
             lines = []
             for s in entries:
                 tag = " (Lab)" if s["course_type"] == "lab" else (" (General)" if s["is_general"] else "")
-                lines.append(f'{s["course_name"]}{tag}\n{s["instructor_name"]}\n{s["room_id"]}')
+                lines.append(f'{s["course_name"]}{tag} [Sec {s["section_id"]}]\n{s["instructor_name"]}\n{s["room_id"]}')
             return "\n---\n".join(lines)
 
         first_by_day_slot = {k: v[0] for k, v in by_day_slot.items()}

templates/department-wise/department_wise_template.py

@@ -32,7 +32,7 @@ def generate_department_wise_templates(sessions, data, output_dir):
             for s in entries:
                 tag = " (Lab)" if s["course_type"] == "lab" else (" (General)" if s["is_general"] else "")
                 batches = "+".join(s["batch_codes"])
-                lines.append(f'{s["course_name"]}{tag} [{batches}]\n{s["instructor_name"]} @ {s["room_id"]}')
+                lines.append(f'{s["course_name"]}{tag} [Sec {s["section_id"]}] [{batches}]\n{s["instructor_name"]} @ {s["room_id"]}')
             return "\n---\n".join(lines)
 
         # for fill-color purposes just use the first session in each cell

templates/room-wise/room_wise_template.py

@@ -33,7 +33,7 @@ def generate_room_wise_templates(sessions, data, output_dir):
             for s in entries:
                 tag = " (Lab)" if s["course_type"] == "lab" else (" (General)" if s["is_general"] else "")
                 batches = "+".join(s["batch_codes"])
-                lines.append(f'{s["course_name"]}{tag}\n{batches}\n{s["instructor_name"]}')
+                lines.append(f'{s["course_name"]}{tag} [Sec {s["section_id"]}]\n{batches}\n{s["instructor_name"]}')
             return "\n---\n".join(lines)
 
         first_by_day_slot = {k: v[0] for k, v in by_day_slot.items()}

templates/student-wise/student_wise_template.py

@@ -37,7 +37,7 @@ def generate_student_wise_templates(sessions, data, output_dir):
         for (day, slot_index), entries in raw_by_day_slot.items():
             if len(entries) > 1:
                 course_list = ", ".join(
-                    f'{e["course_id"]} ({e["course_type"]}) with {e["instructor_name"]} in {e["room_id"]}'
+                    f'{e["course_id"]} Sec {e["section_id"]} ({e["course_type"]}) with {e["instructor_name"]} in {e["room_id"]}'
                     for e in entries
                 )
                 log_error(
@@ -52,7 +52,7 @@ def generate_student_wise_templates(sessions, data, output_dir):
                 return ""
             s = entries[0]
             tag = " (Lab)" if s["course_type"] == "lab" else (" (General)" if s["is_general"] else "")
-            text = f'{s["course_name"]}{tag}\n{s["instructor_name"]}\n{s["room_id"]}'
+            text = f'{s["course_name"]}{tag} [Sec {s["section_id"]}]\n{s["instructor_name"]}\n{s["room_id"]}'
             if len(entries) > 1:
                 text = "CONFLICT!\n" + text
             return text

templates/teacher-wise/teacher_wise_template.py

@@ -14,8 +14,23 @@ from template_logger import log_error  # noqa: E402
 
 def generate_teacher_wise_templates(sessions, data, output_dir):
     written = []
-    for instructor in data["instructors"]:
+
-        code = instructor["instructor_code"]
+    # instructors.csv has one row per (instructor, course, section) teaching
+    # assignment, so the same instructor_code can repeat; render one sheet
+    # per unique instructor, listing all of their assignments in the subtitle.
+    seen_codes = []
+    assignments_by_code = {}
+    name_by_code = {}
+    for row in data["instructors"]:
+        code = row["instructor_code"]
+        if code not in assignments_by_code:
+            seen_codes.append(code)
+            assignments_by_code[code] = []
+            name_by_code[code] = row["instructor_name"]
+        assignments_by_code[code].append(f'{row["course_id"]} (Sec {row["section_id"]})')
+
+    for code in seen_codes:
+        instructor_name = name_by_code[code]
         instr_sessions = [s for s in sessions if s["instructor_code"] == code]
 
         # A teacher can only be in one place at a time: each (day, slot)
@@ -35,7 +50,7 @@ def generate_teacher_wise_templates(sessions, data, output_dir):
                     for e in entries
                 )
                 log_error(
-                    f"Teacher conflict: {instructor['instructor_name']} ({code}) is double-booked on "
+                    f"Teacher conflict: {instructor_name} ({code}) is double-booked on "
                     f"{day} slot {slot_index}: {course_list}"
                 )
             by_day_slot[(day, slot_index)] = entries[0]
@@ -47,17 +62,19 @@ def generate_teacher_wise_templates(sessions, data, output_dir):
             s = entries[0]
             tag = " (Lab)" if s["course_type"] == "lab" else (" (General)" if s["is_general"] else "")
             batches = "+".join(s["batch_codes"])
-            text = f'{s["course_name"]}{tag}\n{batches}\n{s["room_id"]}'
+            text = f'{s["course_name"]}{tag} [Sec {s["section_id"]}]\n{batches}\n{s["room_id"]}'
             if len(entries) > 1:
                 text = "CONFLICT!\n" + text
             return text
 
+        subtitle = "Teaches: " + ", ".join(assignments_by_code[code])
+
         wb = new_workbook()
         ws = wb.active
         build_grid_sheet(
             ws,
-            title=f'{instructor["instructor_name"]} ({code})',
+            title=f'{instructor_name} ({code})',
-            subtitle=f'Department: {instructor["department"]}',
+            subtitle=subtitle,
             time_slots=GRID_TIME_SLOTS,
             sessions_by_day_slot=by_day_slot,
             cell_text_fn=cell_text,