S10	S3 AND S8 AND S9
S9	AB RCT OR “randomised control trial” OR “randomised controlled trial” OR “randomized control trial” OR “randomized controlled trial” OR randomised OR randomized OR placebo* OR (random* AND (allocat* OR assign*)OR (blind* AND (single OR double OR treble OR triple))
S8	S6 AND S7
S7	AB iPad OR tablet OR “tablet computer*” OR touchscreen OR app OR “handheld device” OR “handheld computer” OR “PDA” OR “personal digital assistant” OR “portable computer” OR '"e‐book” OR ebook OR “e‐reader” OR ereader OR “electronic storybook” OR “game* console” OR “digital game” OR smartphone OR “smart phone” OR “mobile phone” OR iPhone OR “cell* phone” OR “portable cell* phone” OR “mobile telephone” OR “cell* telephone” OR “transportable Cell* Phone” OR “1:1 comput*” OR “online instruction” OR “mobile learn*” OR M‐learning
S6	S4 OR S5
S5	AB numeracy OR number* OR math* OR arithmetic OR sums OR calculat* OR addition OR adding OR subtract* OR multiplication OR division OR count* OR algebra OR fractions OR decimal* OR geometr* OR statistic* OR “problem solving” OR “shape sort*” OR “mathematical literacy” OR “quantitative literacy”
S4	AB Literacy OR Reading OR Writing OR Handwriting OR Transcription OR “Verbal reasoning” OR “Critical thinking” OR Comprehension OR Notetaking OR Composition OR “Listening skills” OR Phonic* OR “phonemic awareness” OR Alphabet OR Spell* OR Vocabulary OR Punctuation OR Grammar OR “Reading fluency” OR “Speaking skills” OR “Spoken language” OR “Critical literacy” OR “literacy skills"
S3	S1 OR S2
S2	AB “Primary school” OR “Elementary school” OR “Junior school” OR Kindergarten OR “grade 1” OR “grade 2” OR “grade 3” OR “grade 4” OR “grade 5” OR “First Grade” OR “Second Grade” OR “Third Grade” OR “Fourth Grade” OR “Fifth Grade” OR “1st grade” OR “2nd grade” OR “3rd Grade” OR “4th Grade” OR “5th grade“
S1	AB (“Age* 4” OR “age* 5” OR “age* 6” OR “age* 7” or “age* 8” OR “age* 9” OR “age* 10” OR “age* 11” OR “4 year* old*” OR “5 year* old*” OR “6 year* old*” OR “7 year* old*” OR “8 year* old*” OR “9 year* old*” OR “10 year* old*” OR “11 year* old*” OR Child* OR boy OR girl) AND (school OR class* OR classroom)