Obani, Sylvia a. <br/><br/>
Environmental and pupil-related factors as correlates of elementary science performance in national achievement test fo r grade VI :  bases for science instruction interventions / 
Sylvia A. Obani. 
 - xvi, 165 leaves ;  28 cm. 
<br/><br/> Thesis (Ph.D.) -- University of Antique,2014.  Bibliography : leaves 125-136. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>School children--Rating.<br/>National Achievement Test.<br/>Science--Ability Testing.