A camp on natural resources and environmental conservation in ASEAN countries for
35 youths in Roi-et province was developed by using a manual with an efficiency criteria of
80/80, to create an effectiveness index of the camp and analyze the youths’ knowledge, attitude
and leadership skills before and after attending the camp, differentiated by sex and age, using
three different survey questionnaires. The data was calculated by percentage, mean average,
standard deviation of the response items and analyzed through a t-test and f-test (One-Way
MANOVA), to measure the efficiency criteria and create the effectiveness index. The results
showed that the camp had an efficiency criteria of 90.04/83.44. The effectiveness index of the
camp had a value of 0.6670, which means that 66.70% of the youths had improved their
learnings on natural resources and environmental conservation in ASEAN knowledge, attitude
and leadership skills were significantly higher after attending the camp than before, illustrated
through a statistical significance value of .05. Moreover, there were no differences observed in
the results regarding the youths’ sex. However, there were differences observed among three
different age groups of the youths, i.e., 14 to 15,16 to 17 and 18 to 19 years old, as an univariate
test showed (p <.000).