Perhaps you should try some spelling variations:
performance series » performance studies, performance size
performance review » performance risk, performance evidence
pupil performance » social performance, model performance, judicial performance
poor performance » sector performance
improving pupil » improving public, improving civil, improving audit
improving poor » improving power, improving food, improving peer

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (( improving pupil performance series. ) or ( improving poor performance review. ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( improving pupil performance series. ) OR ( improving poor performance review. )).
• Adding a wildcard symbol may retrieve word variants: (( improving pupil performance series. ) or ( improving poor performance review. ))*.