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 Two Models (Simple Version) (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 three success criteria (S1-a caps on a ten-frame, S1-b crossing out, S1-c the number sentence): the observable behaviour, the tool (We Do, Show Me! pair work, the Pair Sheet, quiz items) and the pass mark.

What is inside (56 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 in pairs), multi-level flow, pictures of what to show, expected answers, PPST annotation column, 7-point quiz with key
• PowerPoint in a COMIC style for non-readers · about 30 slides: one picture or model per slide with a few words the teacher reads aloud, two ways to subtract (caps on a ten-frame, crossing out pictures) with every step on its own click, the missing number filled into the box, Show Me! pair work, a picture map, guided generalization, the whole quiz on screen (picture + number sentence; the question is read aloud from the notes), lively transitions
• 6 printables · Word, ready to print: class and pair rules, the Take-Away Mat (two ten-frames), the Pair Sheet, the quiz with drawn models, class record with exit ticket and home card, board guide with the read-aloud script 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 and picture row drawn by code (exact numbers), and a READ FIRST sheet

Universal edition, SIMPLE VERSION for learners who cannot read yet: fill in your name, school, section, date and the Mother Tongue words of your learners. Fully editable in Word and PowerPoint. (A fuller version with a third model, the number line, is sold separately.)

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.