Measurement]]> Mathematics -- Study and teaching (Elementary)]]> Kit]]> Scales (Weighing instruments)]]> Food -- Weights and measures]]> Food -- Caloric content -- Tables]]> Realia]]> Board games]]> Educational games]]> Space flight to Mars]]> Interplanetary voyages]]> Outer space -- Exploration]]> Game]]> South America -- Civilization]]> Incas]]> Card games]]> Game]]> Educational games -- Juvenile literature]]> Board games -- Juvenile literature]]> Teaching -- Aids and devices -- Juvenile literature]]> Science -- Study and teaching (Elementary) -- Juvenile literature]]> Physical sciences]]> Game]]> Spanish language -- Study and teaching]]> Spanish language -- Vocabulary]]> Word recognition -- Study and teaching]]> Flash card]]> China -- Civilization -- Games]]> game]]> Spanish language -- Study and teaching]]> Spanish language -- Vocabulary]]> English language -- Study and teaching]]> Vocabulary]]> Word recognition -- Study and teaching]]> flash card]]> Holocaust, Jewish (1939-1945)]]> Concentration camps]]> Jews -- Persecutions]]> picture]]> Flags]]> United Nations]]> Realia]]>