OlyPrep
Start free
Elementary Science Olympiad · Michigan

Michigan's county elementary olympiads (WESO · Macomb · Wayne-Oakland · Grand Haven) — dates, events, and how to prepare

Run by Independent county non-profits — the state organisation runs Division B/C only for grades 2–6 (varies by county), Washtenaw (Ann Arbor), Macomb, Wayne and Oakland counties, Grand Haven. A 17-event slate and a rule manual you can read today. Here is what is on the list — and which of it your kid can practise on OlyPrep now.

§01 / This season
Registration closesSee the county
WESO · Pioneer High School, Ann ArborMay 15, 2027
Macomb ESO · Macomb CC South Campus, WarrenMay 15, 2027
Grand Haven ESO · Grand HavenNovember 7, 2026
WhoGrades 2–6 (varies by county)

From the program's own pages, read October 2026. Dates change — the official page is the one to trust.

§02 / The events

WESO (Washtenaw County) — 17 events

AerodynamicsCircuit WizardryCodebustersFeathered FriendsGeology Rocks!iComputeiRobotMystery ArchitectureOn TargetPasta BridgesPentathlonPhoton PhunPotionsRead It Build ItThe Human MachineWhat Went ByZip-It

The rules: WESO (Washtenaw County)'s event page — we link, we don't copy.

Macomb ESO — 17 events

A is for AnatomyAmazing ArthropodsCharged UpCode WarriorsCodebustersCrashCar EggspertCrime BustersMystery ArchitectureOzo OrbitReflection RelayRock HoundSimple MachinesStarry, Starry NightWater RocketsWeather or NotWildlife SafariZowie Estimation

The rules: Macomb ESO's event page — we link, we don't copy.

§03 / What OlyPrep has for this list

Amazing Arthropods, Crime Busters, Codebusters — partly

Amazing ArthropodsMACOMBPartly — our Entomology topic covers the core; not yet: arachnids, centipedes, millipedes, crustaceans; 20 named Great Lakes species; the student collection (Macomb)
Crime BustersMACOMBPartly — our Crime Busters topic covers the core; not yet: chromatography, shoe and tire prints; corn meal, yeast, calcium carbonate may be off our list (Macomb)
CodebustersMACOMBPartly — our Codebusters topic covers the core; not yet: Tap Code, PigPen, Dancing Men (Macomb)
CodebustersWESOPartly — our Codebusters topic covers the core; not yet: Vigenère and the WESO cipher list (2027 rules not yet posted; read from 2026)
A is for AnatomyMACOMBNot yet — cardiovascular, respiratory, lymphatic (Macomb)
The Human MachineWESONot yet — all 11 systems with a rotating focus system and clinical stations (WESO)
The other 15Not yet — tell us which, below

OlyPrep is built to the Bay Area Elementary Science Olympiad's rules. We read Michigan's county elementary olympiads (WESO · Macomb · Wayne-Oakland · Grand Haven)'s rules event by event: where the scope is the same, the practice is the same; where it isn't, we'd rather say so than hand your kid the wrong material.

§04 / Middle school

Michigan's middle-school circuit is Michigan Science Olympiad (state tournament April 24, 2027) — Science Olympiad's Division B, one national rulebook.

§05 / Tell us
Two questions

Which events is your kid in?

OlyPrep is built to the Bay Area Elementary Science Olympiad's rules today. Where Michigan's county elementary olympiads (WESO · Macomb · Wayne-Oakland · Grand Haven)'s events share that scope, the practice is the same; the rest we count and tell you when it's ready — the Bay Area topics are open to your kid meanwhile.

Free · we count the rest