11. This they did in a draft of male citizens assembled by age class . 12. It suddenly found it couldn't afford Kalvin's small, multi-age class . 13. The dominant age classes were affected by the environmental conditions. 14. In a Leslie model, the population is divided into groups based on age classes . 15. Beetles were taken by all other age classes of chicks, but in smaller amounts. 16. In small, multi-age classes , children are nurtured as curious, creative, and compassionate world citizens. 17. "I wanted all plumages, age classes and sexes, of all species, " he said. 18. Brown and Zeng calculated an annual death rate of 0.35 for all age classes . 19. Contemporary teaching and learning materials are developed for multi-age classes . 20. He has taught University of the Third Age classes since his retirement from full-time teaching.
