timid - shy; lacking confidence or courage, strenuous - taking great effort or energy, endurance - the ability to continue doing a stressful effort or activity, firebreak - an obstacle to the spread of fire, smokejumper - a firefighter who parachutes in to the site of a forest fire, aerobics - exercise designed to strengthen the heart, academy - a school that teaches special subjects or skills, calculate - to figure out an answer, usually by adding, subtracting, multiplying, or dividing, scramble - to climb or move quickly using your hands and feet, overcome - to win against or defeat,

Fire Jumpers a School for HeroesVocabulary

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