Classroom Observation (CO) Lesson Pack for Grade 1 Mathematics, Term 2, ready for the 1st CO of SY 2026-2027 for Teacher I-III (Beginning towards Proficient). One complete 45-minute lesson: Take Away! Subtracting Numbers up to 20 Using Different Models (BCO Week 10, Subtract numbers with minuends up to 20 using different models.).

CO schedule and PPST indicators

1st Classroom Observation, SY 2026-2027, Teacher I-III (DepEd Memorandum No. 89, s. 2025, Table 7; COT rubric Levels 2–6). Each Classroom Observable Indicator is annotated at least twice in the lesson flow, with the evidence the observer will see, plus an Annex A matrix:

• 1.1.2 Apply knowledge of content within and across curriculum teaching areas.
• 1.4.2 Use a range of teaching strategies that enhance learner achievement in literacy and numeracy skills.
• 1.5.2 Apply a range of teaching strategies to develop critical and creative thinking, as well as other higher-order thinking skills.
• 1.6.2 Display proficient use of Mother Tongue, Filipino and English to facilitate teaching and learning.
• 2.1.2 Establish safe and secure learning environments to enhance learning through the consistent implementation of policies, guidelines and procedures.
• 2.2.2 Maintain learning environments that promote fairness, respect and care to encourage learning.

Learning competency

• Find the missing number in addition or subtraction sentences involving numbers up to 20. (Schools Division BCO, Term 2, Week 10 (also the MATATAG Grade 1 Mathematics BoW, Term 2, Week 9))

Learning objective (verbatim from a Schools Division BCO, Term 2 Week 10)

• Subtract numbers with minuends up to 20 using different models.

The objective is measured through four success criteria (S1-a caps on a ten-frame, S1-b crossing out, S1-c the number line, S1-d the number sentence): the observable behaviour, the tool (We Do, the Take-Away Team cards ticked by a Checker, quiz items) and the pass mark.

What is inside (59 files)

• Lesson Plan in the ILAW Lesson Plan Template (DO 016, s. 2026) · Word, portrait and lean: lesson part named on every activity (CPA with I Do, We Do, You Do), multi-level flow, pictures of what to show, expected answers, PPST annotation column, 7-point quiz with key
• PowerPoint in a COMIC style for Grade 1 · about 30 slides: very short lines the teacher reads aloud, dot-card drill, a mango story with a guess, four math words with pictures, the three models with every step on its own click (caps on a ten-frame, crossing out, hopping back on a number line), the missing number filled into the box, the Take-Away Team cards, a picture map, guided generalization, the whole quiz on screen (one item per slide), lively transitions, teacher script in the notes
• 7 printables · Word, ready to print: class and group rules, the Take-Away Mat (double ten-frame + number line 0–20), team cards, a home activity sheet, the quiz with drawn models, class record with exit ticket and home card, board guide and answer keys (teacher copy)
• Teacher Guide · the teacher’s analysis with the 45-minute arithmetic, preparation lists, pre-observation conference notes, measurement map for the objective, contingency plan
• Pictures in comic style, and every ten-frame, picture row and number line drawn by code (exact numbers), and a READ FIRST sheet

Universal edition: fill in your name, school, section, date and the Mother Tongue words of your learners. Written in very short, simple English for Grade 1 learners still learning to read, with Filipino and Mother Tongue support; fully editable in Word and PowerPoint.

Prepared with the help of Matudlo AI and checked by the author. As DO 016, s. 2026 requires, please review, adapt and sign the plan before use. Licensed to one teacher for their own classes; do not resell or share.