Creating and Interpreting the Achievement Scales
	
        
                    - Reviewing the TIMSS and PIRLS 2011 Achievement Item Statistics
                        
                    
- Scaling the TIMSS and PIRLS 2011 Achievement Data
                        
                    
- Estimating Standard Errors for the TIMSS and PIRLS 2011 Achievement Data
                        
                    
- Using Scale Anchoring to Interpret the TIMSS and PIRLS 2011 Achievement Scales
                        
                    
 
 
