● Life Science · Quarter 1
Science 8 — Three in Four Is a Chance, Not a Count
A Punnett square is four boxes and takes a minute to fill. The hard part is what the four boxes mean: each one is a separate chance for each child, not a share of a family. A couple with a 3 : 1 ratio can have four children with the recessive trait and nothing has gone wrong with the genetics — which is the sentence most people never quite accept.
The set for this week
Every item is one file. It opens with a double-click, works with the Wi-Fi off, and copies to a phone or a USB stick.
Course Syllabus
For the teacher. The full year on the three-term calendar. All 44 CG competencies across four domain quarters — and the reason Grade 8 opens on Life Science when Grade 7 opened on Science of Materials.
Lesson Plan — ILAW
For the teacher. The whole five-day week in the format DepEd prescribes for filing. Day 3 is the coin session, where the class generates its own data and discovers that 3 : 1 almost never comes out as three and one.
Lesson Plan — Lesson Exemplar
For the teacher. Day 1 at teaching depth. The square is filled in minute twelve and then interrogated for twenty minutes, because filling it is not the difficulty. Seven anticipated misconceptions.
Assessment Pack
For the teacher. A Table of Specifications, two tests with keys, a weekly check, and rubrics for all four quarterly performance tasks — which the Science guide requires rather than suggests.
Class Record
For the teacher. Raw scores in, grade out, at 20 / 50 / 30 under DO 015 s. 2026. Transmutation is a year switch, not a constant. Nothing is stored and nothing is sent.
Slides
For the class. Fifteen slides. The Punnett squares are drawn to scale as four equal cells — three shaded and one not — rather than as a pie chart labelled 75 %.
Fill the Square
For the class. Three rounds with drawn Punnett squares. Round 3 is the probability round, and it is the one that separates a learner who can fill a square from one who knows what it says.
Offline Activities
For the teacher. Three individual and two group activities needing nothing but coins, paper and the class's own inherited traits. Every group member has a named role.
Learner Worksheet
For the class. One A4 page per learner. Genotype ratio and phenotype ratio are asked for separately every time, and the last item is a family with four children and a surprise.
One Letter at a Time
For the class. A different route to the same competency, not a shorter one. Four tasks, each with a worked example above it, starting from two coins rather than from two letters.
Wall Chart
For the class. A4 landscape, printable and laminatable. How to fill the square, how to read it, and the four things it does not say.
Also in this grade
Further materials, listed here so they are not missed.
+Week Planner
For the teacher. All 33 weeks of the year, with the curriculum guide competency for each.
+Common Misconceptions
For the teacher. 7 misconceptions this week, and what to do about each.
+Observation Card
For the teacher. Eight slips to cut apart — one per learner — for recording their exact words.
+What Good Work Looks Like
For the class. The standard, stated to the learner before the task rather than after.
+One Letter at a Time — Science 8
For the class. Science 8, Term 1 · Week 4. A4, photocopy-safe, answer key screen-only.
+Ten Minutes at Home: The Coin That Does Not Remember — Science 8
For home. A one-page home activity for Science 8, using ordinary household objects, with what to say, what to avoid, and how to tell it is working.