All signs starting with the letter "S"
SAD
SAME
SCARED
SCHOOL
SCIENCE
SCREEN
SEE
SEE-YOU-LATER
SHE
SHEEP
SHIRT
SHOES
SHORT
SHOW
SHY
SICK
SILVER
SINGLE
SISTER
SIT
SKIRT
SLEEP
SMALL
SNAKE
SNOW
SOCCER
SOCKS
SOMETIMES
SORRY
SPOON
SPORTS
STAND
STAR
STOP
STORE
STUDENT
SUN
SURPRISED
SWIM