Class 6 Computational Thinking, Lessons 11 and 12 Symmetry & Below Zero

Symmetry & Below Zero: Class 6 Computational Thinking, Lessons 11 and 12 — Reflection, quarter-turns, signed numbers and running totals, with four fully solved puzzles Explore Symmetry and The Other Side of Zero for Class 6. Learn mirror tests, quarter-turn symmetry, signed numbers and running totals, then solve four puzzles through decomposition, algorithms and verification. Chapters 0:00 Class 6 · Two puzzles hidden in everyday life 0:28 Symmetry · Reflection 1:14 Symmetry · Rotation 2:07 Puzzle 1 · Repair the badge 2:40 Puzzle 1 · Compare mirror partners 3:36 Puzzle 2 · Quarter turns and neighbours 4:13 Puzzle 2 · Test, mark, count 5:23 The Other Side of Zero · Signed numbers 6:13 The Other Side of Zero · Running totals 7:04 Puzzle 3 · The first negative code 7:36 Puzzle 3 · Find the boundary 8:35 Puzzle 4 · Rebuild the scorecard 9:21 Puzzle 4 · Work backwards, check forwards 10:52 Recap · Rules you can test 11:31 Try your own challenge Covered: reflection, rotational symmetry, ninety degrees, grid neighbours, abstraction, negative numbers, number line, sequences, running totals, work backwards, computational thinking. Adapted from the CBSE Class 6 Teacher Handbook (2026-27): contents entries 11 and 12, internally headed Chapters 9 and 10. All puzzles are fully stated; no handbook is needed. Try designing a one-square symmetry puzzle or changing a price in the scorecard. #class6 #computationalthinking #cbse #symmetry #integers