Unit 1: Long a, Long e
operate foggy complete screen straight claim gasoline scary police memory
needle eighty neighbor explain contain beneath freight daily feature populate

Challenge Words: replace, Braille, lease, outweigh, delete, marine

Unit 2: Long i, Long o
arrive design froze describe excite slope supply polite silent bowl
growth chosen spoken thrown style locate type tone deny decide

Challenge Words: lotion, grocer, horizon, sorrow, retire, dynamite

Unit 3: Vowel Sounds: /oo/, /yoo/
humid rescue include movies avenue remove unit continue value produce
prove annual future humor amuse costume suit beauty museum youth

Challenge Words: butte, pollute, nuisance, utensil, junior, substitute

Unit 4: Vowel /o/
launch install drawing astronaut drawn shawl loss caution office broth
false broad lawyer scald awful author audience recall automobile flaw

Challenge Words: coffee, auburn, falter, faucet, awkward, alternate

Unit 5: Short Vowel Sounds
magic staff sense swift habit credit direct discuss interest thus exist splendid contest exact active deposit business building promise solve

Challenge Words: secretary, treasurer, senate, cashier, summon, vanish

Unit 6: Assessment and Review
marry timid lying soup sausage throne olive haste salty pure rude scrawl cease demand desire walnut funeral bestow closet failure

Unit 7: Consonant Sounds: /sh/, /ch/
shadow bunch picture chest patient cheap nature shelter official kitchen
social publish special exchange furniture motion ancient delicious shoulder pasture

Challenge Words: champion, scorching, situated, eruption, suction, extinguish

Unit 8
humble final festival fossil general angel normal panel scramble parcel council angle evil marvel civil pupil syllable rural loyal counsel

Challenge Words: mussel, freckle, arrival, stencil, possible, additional

Unit 9
citizen solution mission differ dozen profession mention section bother motor
companion common million mayor onion governor senator oven copper remember

Challenge Words: latter, escalator, specimen, elevator, cinnamon, suspicion

Unit 10: r-controlled Vowels: /ur/
rehearse external world further purpose perfume circulate internal current deserve murmur service alert burnt squirrel worth disturb search worst conserve

Challenge Words: girth, birthmark, furnish, stirrups, hurdles, swerve

Unit 11: r-controlled Vowels: /ar/, /ar/
repair guard argue flair area aware remark department article harvest
carpet scarce vary farther despair pardon declare prepare regard flare

Challenge Words: wary, aquarium, harmonica, solitaire, carnival, pharmacy

Unit 12: Assessment and Review
armor attach worse modern peril stern shallow aircraft penalty prison
linen ample welfare fixture earnest morsel vigor burglar butcher scarlet

Unit 13: r-controlled Vowels: /or/, /ir/
inform important reward peer career ornament warmth appear weary pierce
disappear serious perform pier formal pioneer forever force fortune enormous

Challenge Words: florist, corporal, sincere, boardwalk, eerie, ordinance

Unit 14: Vowel Diphthongs: /oi/, /ou/
moisture mountain poise couch bound voyage coward pronounce tower appoint
employ allow avoid sour allowance ounce oyster decoy destroy annoy

Challenge Words: lounge, trousers, loiter, foundation, corduroy, asteroid

Unit 15: Prefixes: pre-, re-, post-, co-
prerecorded prehistoric precaution prefix refresh reappear posttest postwar coworker postdate postscript coauthors rejoin reform reenter cooperate recharge coexist prepaid reclaim

Challenge Words: preface, redirect, co-anchor, preamble, recuperate, post meridiem

Unit 16: Suffixes: -er, -est, -ed, -ing
calmer sunnier denied wisest supplied slimmest wiser interesting removing slimmer removed grayest sunniest grayer interested denying trimming trimmed calmest supplying

Challenge Words: laughed, hiccupped, fluffier, laughing, hiccupping, fluffiest

Unit 17: Consonant Sounds: /k/, /s/
chorus recent jacket recite comic create practice frantic celebrate select
suitcase company choir exercise plastic cereal expect grocery correct stomach

Challenge Words: recipe, crackers, coconut, juicy, scallop, broccoli

Unit 18: Assessment and Review
clearing chrome continued co-owner earlier noisy sheer cucumber friendliest drown refuel convoy warning conceal lore beginning rethink fountain cinema prepackage

Unit 19: State Names
Ohio Texas Alabama Washington Massachusetts Maine Nevada Maryland
New York Alaska Montana South Carolina North Dakota Iowa Florida California Colorado

Challenge Words: Austin (TX), Albany (NY), Juneau (AK), Sacramento (CA), Cheyenne (WY), Tallahassee (FL)

Unit 20: Prefixes: dis-, im-, in-, non-, un-
dishonest unequal unsure unbutton nonsense incomplete incorrect disagree impolite unknown imperfect dislike inactive disobey impossible nonfiction nonstop nonviolent impatient informal

Challenge Words: unlikely, immature, nondairy, uncommon, insincere, discontinue

Unit 21: Endings -en, ize
broken shaken loosen modernize frozen frighten fertilize summarize stolen civilize specialize awaken criticize generalize flatten organize realize forgotten memorize straighten

Challenge Words: quicken, strengthen, dramatize, broaden, colonize, plagiarize

Unit 22: Compound Words
outline, homework, downstairs, part of speech, double-header, home run, peanut butter, themselves, sweatshirt, itself, full-time, waterproof, parcel post, forty-four, twenty-seven, up-to-date, make-believe, underline, good-bye,merry-go-round

Challenge Words: eyeglasses, field goal, decimal point, cheerleader, time zone,
daylight-saving time

Unit 23: Easily Confused Words
vane kernel invent capitol event principal vein except accept capitalcountry county colonel vain diary weight coarse dairy principle course

Challenge Words: navel, burrow, bridal, naval, borough, bridle

Unit 24: Assessment and Review
proven ally device close-up devise Wisconsin unfasten sharpen magnetize pocketbook disgrace weather map Arkansas Wyoming Arizona horseback nonsmoker unlisted impure alley

Unit 25: Suffixes: -or, -er, -ist
director typist operator artist cyclist pitcher scientist professor passenger actor commander editor creditor inventor publisher colonist homemaker instructor tourist gardener

Challenge Words: aviator, discoverer, cartoonist, commentator, adventurer, specialist

Unit 26: Plurals
soldiers treaties characters beliefs loaves pianos countries badges gentlemen groceries essays luggage valleys latches heroes chiefs skis palaces envelopes diaries

Challenge Words: oboes, orchids, galleries, tactics, teenagers, secretaries

Unit 27: Prefixes: bi-, mid-, semi-, tri-
bimonthly bicycle semiannual tricycle triangle midday midterm midafternoon midnight biweekly semicircle semifinal semicolon bifocals midland trisect midair bisect semisweet semiformal

Challenge Words: bilateral, midfield, tricornered, bicoastal, midsection, semiweekly

Unit 28: Consonant Sound /j/
generous margin college apology region message energy lodge gentlemen damage stranger oxygen imagine arrange ledger grudge genius stingy pledge average

Challenge Words: fidget, sledgehammer, gesture, misjudge, gender, refrigerator

Unit 29: Suffixes: -ty, -ity, -ness, -ment, -ive
vanity detective argument activity creativity humanity loyalty humidity relative arrangement sickness majority ability employment swiftness
amusement gentleness blindness specialty tardiness

Challenge Words: replacement, promptness, mobility, refreshment, usefulness, maturity

Unit 30: Assessment and Review
captive density drummer gently midstream register wedge counselor loneliness ginger ourselves biplane batteries juggler installment organist radios triweekly ranches semidarkness

Unit 31: Words Writers Use
diamond language thorough chocolate address handsome beautiful judgment route poison truly government separate cousin although camera umbrella suppose sincerely skiing

Challenge Words: waive, croquet, sergeant, gradual, acquire, poinsettia

Unit 32: Suffixes: -ous, -ish, -ant, -ic
childish pleasant cubic adventurous vigorous joyous basic dramatic vacant foolish energetic humorous marvelous dangerous mysterious bluish stylish famous radiant selfish

Challenge Words: reluctant, periodic, thunderous, terrific, ticklish, simultaneous

Unit 33: Synonyms and Antonyms
delight freedom narrow decrease forward exit lengthen eastern private pleasure public backward entire whole entrance increase liberty western extend slender

Challenge Words: deflate, worried, incident, inflate, distressed, happening

Unit 34: Words From Other Languages
haiku alligator kimono crochet burro macaroni knapsack plaid yogurt guitar
karate boomerang robot shampoo hammock chipmunk plaza waffle beret yodel

Challenge Words: chowder, safari, kayak, goulash, llama, verandah

Unit 35: Abbreviations apt. (apartment) gal. (gallon) sq. (square) yr. (year) amt. (amount)
no. (number) oz. (ounce) Gen. (General) co. (company) pt. (pint)
qt. (quart) yd. (yard) ave. (avenue) doz. (dozen) hr. (hour)
in. (inch) lb. (pound) wt. (weight) pkg. (package) ft. (foot)

Challenge Words: Jr., adj., ht., Sr., adv., etc.

Unit 36: Assessment and Review
envious tsp. min. tbsp. mi. clamor domestic vibrant patio horrible barrette uproar exhibit sheepish ukulele ignorant poncho mustache display dreadful