Hafizud Din  <br/><br/>
Effectiveness of problem based teaching on students achievements and conceptual understanding in chemistry at secondary level in Chitral  / 
Hafizud Din  
 - 1  Allama Iqbal Open University  2021. 
 - 83p. 
<br/><br/> HB 
<br/><br/>MPhil/MS 
<br/><br/><br/>Eng 
<br/><br/><label>Standard No.: </label>https://i.ibb.co/DcNFC41/Thesis-cover.png 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chemistry-Study and teaching-Secondary level<br/>Dissertations, Academic--MPhil Science Education
<br/><br/><label>Dewey Class. No.: </label>540.712  / HAE