Tuesday · 17:30 · Online

Math for grades 3-4 (Sky-34/2)

Olympiad math for grades 3-4: serious preparation for competitions and the development of mathematical culture. We study invariants, graphs, combinatorics with constraints, and work on geometry through origami. Children learn to construct proofs, find counter-examples, and think like real mathematicians.

Missed lessons can be made up with another group

• Start: solver's toolkitDiagram, table, enumeration, edge-case checking.
• Logic detective 1: 4×4 tablesComplex detective puzzles.
• Propositional logic"If…, then…", "and/or/not".
• Knights and liars PROAdvanced truth-and-lies problems.
• Invariant problemsWhat does not change under transformations.
• Sets: Venn diagrams and countingIntersections and unions.
• Graphs: routes and connectionsVertices, edges, paths.
• Systematic enumeration: lists and tablesOrganizing the search.
• Variant trees and the multiplication ruleCodes, menus, branches.
• Combinatorics with constraints"No repeats", "not adjacent".
• Combinatorics on a grid: paths through cellsCounting paths with obstacles.
• Permutations and combinationsOrder matters / does not matter.
• Symmetry and transformationsAxes, central symmetry.
• Angles and areas through foldingOrigami geometry.
• Volume and nets: cube, prism3D thinking.
• Big quest mix + diplomasFinal adventure!