Journals / International Journal of Assessment Tools in Education / 2026 / Volume: 13 Issue: 3

Development of flipped mathematics classroom acceptance scale for middle school students

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Publication Date
2026-09-02
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

As a result, a valid and reliable scale was developed and approved for middle school students within the scope of the research.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study aims to develop a valid, and reliable scale to measure middle school students' acceptance levels of flipped mathematics classrooms.
📊
Key Findings & Data:The study was conducted with three study groups (n1 = 326, n2 = 721, n3 = 84) consisting of middle school students (5th-8th grades).
💡
Conclusion & Impact:As a result, a valid and reliable scale was developed and approved for middle school students within the scope of the research.
🔬Design:Review & Systematic Survey
📍Scope:Comprehensive Sample
⚙️Variables:Middle school · Scale development · Mathematics

Abstract

This study aims to develop a valid, and reliable scale to measure middle school students' acceptance levels of flipped mathematics classrooms. The study was conducted with three study groups (n1 = 326, n2 = 721, n3 = 84) consisting of middle school students (5th-8th grades). In the scale development process, the researchers employed a sequential exploratory mixed-methods research design, following both qualitative procedures (literature review, expert opinions, and student opinions) and quantitative procedures (construct validity, nomological validity, convergent validity, discriminant validity, criterion validity, and internal consistency reliability). In the study, the results of the validity and reliability analyses of the Flipped Mathematics Classrooms Acceptance Scale (FMCAS), which consists of 38 items and 6 factors on a 5-point Likert-type scale, were found to be at the desired level. As a result, a valid and reliable scale was developed and approved for middle school students within the scope of the research.

Özet

This study aims to develop a valid, and reliable scale to measure middle school students' acceptance levels of flipped mathematics classrooms. The study was conducted with three study groups (n1 = 326, n2 = 721, n3 = 84) consisting of middle school students (5th-8th grades). In the scale development process, the researchers employed a sequential exploratory mixed-methods research design, following both qualitative procedures (literature review, expert opinions, and student opinions) and quantitative procedures (construct validity, nomological validity, convergent validity, discriminant validity, criterion validity, and internal consistency reliability). In the study, the results of the validity and reliability analyses of the Flipped Mathematics Classrooms Acceptance Scale (FMCAS), which consists of 38 items and 6 factors on a 5-point Likert-type scale, were found to be at the desired level. As a result, a valid and reliable scale was developed and approved for middle school students within the scope of the research.

🔖

Cite This Article

Açıkgül, K., Fırat, S. (2026). Development of flipped mathematics classroom acceptance scale for middle school students. International Journal of Assessment Tools in Education, Volume: 13 Issue: 3. https://doi.org/10.21449/ijate.1682497

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References (94)

  1. Abd Rahman, S.F., Md Yunus, M., & Hashim, H. (2021). Applying UTAUT in predicting ESL lecturers intention to use flipped learning. Sustainability, 13(15), 8571. https://doi.org/10.3390/su13158571
  2. Abdekhoda, M., Maserat, E., & Ranjbaran, F. (2020). A conceptual model of flipped classroom adoption in medical higher education. Interactive Technology and Smart Education, 17(4), 393-401. https://doi.org/10.1108/ITSE-09-2019-0058
  3. Afolabi, E.I., Oteyola, T.A., & Awopetu, O.E. (2020). Assessment of level of awareness an acceptance of flipped strategy among Oyo state secondary school teachers. AAUA Journal of Science and Technology Education, 3(1), 1-11.
  4. Agyei, C., & Razi, Ö. (2022). The effect of extended UTAUT model on EFLs’ adaptation to flipped classroom. Education and Information Technologies, 27, 1865 1882. https://doi.org/10.1007/s10639-021-10657-2
  5. Aidinopoulou, V., & Sampson, D.G. (2017). An action research study from implementing the flipped classroom model in primary school history teaching and learning. Journal of Educational Technology & Society, 20(1), 237–247.
  6. Algarni, B., & Forgues, H.L. (2022). An evaluation of the impact of flipped-classroom teaching on mathematics proficiency and self-efficacy in Saudi Arabia. British Journal of Educational Technology (BJET), 54(1), 414-435. https://doi.org/10.1111/bjet.13250
  7. Anand, S.A.A. (2021). Flipped pedagogy: Strategies and technologies in chemistry education. Materials Today: Proceedings, 47(1), 240-246. https://doi.org/10.1016/j.matpr.2021.04.133
  8. As, H., & Eskici, M. (2023). Attitudes of secondary school students towards hybrid teaching. International Journal of Computers in Education, 6(2), 47 59. https://doi.org/10.5281/zenodo.10445429
  9. Aytekin, E. (2015). Investigation of middle grade students' attitudes towards use of technology in mathematics lessons [Unpublished master’s thesis]. Middle East Technical University.
  10. Bakheet, E., & Gravell, A. (2020). Investigating factors based on an extended UTAUT Model to confirm Computer Science instructors’ behavioural intention to adopt the flipped classroom. International Journal of Information and Education Technology, 10, 736 743. https://doi.org/10.18178/ijiet.2020.10.10.1451
  11. Bergmann, J., & Sams, A. (2012). Flip your classroom: Reach every student in every class every day. International Society for Technology in Education.
  12. Bhagat, K.K., Chang, C.N., & Chang, C.Y. (2016). The impact of the flipped classroom on mathematics concept learning in high school. Journal of Educational Technology & Society, 19(3), 124-132.
  13. Bishop, J., & Verleger, M.A. (2013, June). The flipped classroom: A survey of the research. In Proceedings of the 2013 ASEE Annual Conference & Exposition (Paper ID #6219). American Society for Engineering Education.
  14. Bond, M. (2020). Facilitating student engagement through theflipped learning approach in K 12: A systematic review. Computers & Education, 151, 103819. https://doi.org/10.1016/j.compedu.2020.103819
  15. Brown, T.A. (2006). Confirmatory factor analysis for applied research. Guilford Press.
  16. Brown, S.A., & Venkatesh, V. (2005). Model of adoption of technology in households: A baseline model test and extension incorporating household life cycle. MIS Quarterly, 29(3), 399–426. https://doi.org/10.2307/25148690
  17. Cabero-Almenara, J., Romero Tena, R., Llorente Cejudo, M.D.C., & Palacios Rodríguez, A.D.P. (2021). Academic performance and technology acceptance model (TAM) through a flipped classroom experience: Training of future teachers of primary education. Contemporary Educational Technology, 13 (3), ep305. https://doi.org/10.30935/cedtech/10874
  18. Cai, J., Yang, H.H., Gong, D., MacLeod, J., & Zhu, S. (2019). Understanding the continued use of flipped classroom instruction: A personal beliefs model in Chinese higher education. Journal of Computing in Higher Education, 31, 137-155. https://doi.org/10.1007/s12528-018-9196-y
  19. Cameron, A. (2004). Kurtosis. In M. Lewis-Beck, A. Bryman, & T. Liao (Eds.), Encyclopedia of social science research methods (pp. 544–545). SAGE Publications.
  20. Chang, A. (2012). UTAUT and UTAUT 2: A review and agenda for future research. Journal the Winner, 13(2), 106–114. https://doi.org/10.21512/tw.v13i2.656
  21. Chao, C.Y., Chen, Y.T., & Chuang, K.Y. (2015). Exploring students’ learning attitude and achievement in flipped learning supported computer aided design curriculum: A study in high school engineering education. Computer Applications in Engineering Education, 23(4), 514 526. https://doi.org/10.1002/cae.21622
  22. Chen, Y., Wang, Y., & Chen, N.S. (2014). Is FLIP enough? Or should we use the FLIPPED model instead?. Computers & Education, 79, 16-27. https://doi.org/10.1016/j.compedu.2014.07.004
  23. Cheng, L., Ritzhaupt, A.D., & Antonenko, P. (2019). Effects of the flipped classroom instructional strategy on students’ learning outcomes: A meta‑analysis. Educational Technology Research and Development, 67, 793–824. https://doi.org/10.1007/s11423-018-9633-7
  24. Cheung, G.W., & Rensvold, R.B. (2002). Evaluating goodness-of-fit indexes for testing measurement invariance. Structural Equation Modeling: A Multidisciplinary Journal, 9, 233 255. https://doi.org/10.1207/S15328007SEM0902_5
  25. Cevikbas, M., & Kaiser, G. (2020). Flipped classroom as a reform-oriented approach to teaching mathematics. ZDM Mathematics Education 52, 1291–1305. https://doi.org/10.1007/s11858-020-01191-5
  26. Clark, K.R. (2015). The effects of the flipped model of instruction on student engagement and performance in the secondary mathematics classroom. Journal of Educators Online, 12(1), 91-115. https://files.eric.ed.gov/fulltext/EJ1051042.pdf
  27. Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Erlbaum.
  28. Costello, A.B., & Osborne, J.W. (2005). Best practices in exploratory factor analysis: four recommendations for getting the most from your analysis. Practical Assessment, Research & Evaluation, 10(7), 1-9. https://doi.org/10.7275/jyj1-4868
  29. Creswell, J.W. (2003). Research design: Qualitative, quantitative, and mixed methods approaches. Sage Publications.
  30. Creswell, J.W., & Plano Clark, V.L. (2011). Designing and conducting mixed methods research (2nd ed.). Sage Publications.
  31. Çokluk, Ö., Şekercioğlu, G., & Büyüköztürk, Ş. (2010). Sosyal bilimler için çok değişkenli istatistik: SPSS ve LİSREL uygulamaları [Multivariate statistics for social sciences: SPSS and LISREL applications]. Pegem.
  32. Davis, L.L. (1992). Instrument review: getting the most from a panel of experts. Applied Nursing Research, 5, 194-197. http://dx.doi.org/10.1016/S0897-1897(05)80008-4
  33. Diaz, M.C., & Loraas, T. (2010). Learning new uses of technology while on an audit engagement: Contextualizing general models to advance pragmatic understanding. International Journal of Accounting Information Systems, 11(1), 61–77. https://doi.org/10.1016/j.accinf.2009.05.001
  34. Dodds, W.B., Monroe, K.B., & Grewal, D. (1991). Effects of price, brand, and store information on buyers’ product evaluations. Journal of Marketing Research, 28(3), 307 319. https://doi.org/10.1177/002224379102800305
  35. Erdoğan, İ., & Polat, M. (2017). How much do our schools have constructivist learning environments? A longitudinal view on middle school students’ perceptions. Dicle University Journal of Ziya Gokalp Education Faculty, 30, 608-619.
  36. Fernández-Martín, F.D., Romero-Rodríguez, J.M., Gómez-García, G., & Ramos Navas-Parejo, M. (2020). Impact of the flipped classroom method in the mathematical area: A systematic review. Mathematics, 8(12), 2162. https://doi.org/10.3390/math8122162
  37. Fidan, M., Debbağ, M., & Çukurbaşı, B. (2020). Technology proficiency self-assessments of teachers becoming professional in the 21st century: A scale adaptation study. Pegem Journal of Education & Instruction, 10(2), 465-492. http://dx.doi.org/10.14527/pegegog.2020.016
  38. Field, A. (2009). Discovering statistics using SPSS (3rd ed.). Sage Publication.
  39. Forgasz, H.J. (2004, July 14-18). Equity and computers for mathematics learning: Access and attitudes. In M.J. Johnsen Høines & A.B. Fuglestad (Eds.), Proceedings of the 28th Conference of the International Group for the Psychology of Mathematics Education (PME) (Vol. 2, pp. 399–406). Bergen, Norway: Bergen University College. http://files.eric.ed.gov/fulltext/ED489745.pdf
  40. Fung, C.H., Besser, M., & Poon, K.K. (2021). Systematic literature review of flipped classroom in Mathematics. Eurasia Journal of Mathematics, Science and Technology Education, 17(6), em1974. https://doi.org/10.29333/ejmste/10900
  41. Gafoor, K.A., & Sarabi, M.K. (2015, November 26–28). Nature of mathematics that impacts difficulties in learning it: A comparison of student perspectives on learning school subjects from Kerala. [Paper presentation]. All India Association for Educational Research Annual cum International Conference on Standards and Benchmarks for Excellence in Learning, Teaching and Research, India. https://files.eric.ed.gov/fulltext/ED581534.pdf
  42. Giannakos, M.N., Krogstie, J., & Chrisochoides, N. (2014, November 5-6). Reviewing the flipped classroom research: Reflections for computer science education. In Proceedings of the Computer Science Education Research Conference (pp. 23 29). ACM. https://doi.org/10.1145/2691352.2691354
  43. Graham, M., McLean, J., Read, A., Suchet-Pearson, S., & Viner, V. (2017). Flipping and still learning: Experiences of a flipped classroom approach for a third-year undergraduate human geography course. Journal of Geography in HigherEducation, 41(3), 403 417. https://doi.org/10.1080/03098265.2017.1331423
  44. Hair, J.F., Jr., Black, W.C., Babin, B.J., Anderson, R.E., & Tatham, R.L. (2014). Multivariate data analysis (7th ed.). Pearson New International Edition.
  45. Haneefa, M.M. (2023). The use of online flipped classrooms during COVID-19 by gifted students: A path analysis using UTAUT model. International Journal of Instruction, 16(2), 213-228. https://doi.org/10.29333/iji.2023.16213a
  46. Hao, Y. (2016). Middle school students' flipped learning readiness in foreign language classrooms: Exploring its relationship with personal characteristics and individual circumstances. Computers in Human Behavior, 59, 295-303. https://doi.org/10.1016/j.chb.2016.01.031
  47. Hatcher L. (1994). A step-by-step approach to using the SAS® system for factor analysis and structural equation modeling. SAS Institute, Inc.
  48. He, W., Holton, A., Farkas, G., & Warschauer, M. (2016). The effects of flipped instruction on out-of-class study time, exam performance, and student perceptions. Learning an Instruction, 45, 61-71. http://dx.doi.org/10.1016/j.learninstruc.2016.07.001
  49. Hu, L.T., & Bentler, P.M. (1999). Cutoff criteria for fit indexes in covariance structure analysis: Conventional criteria versus new alternatives. Structural Equation Modeling: A Multidisciplinary Journal, 6(1), 1-55. https://doi.org/10.1080/10705519909540118
  50. Isman, A., & Celikli, G.E. (2009). How does student ability and self-efficacy affect the usage of computer technology?. The Turkish Journal of Educational Technology, 8(1), 33–38.
  51. Jiang, M.Y.C., Jong, M.S.Y., Lau, W.W.F., Chai, C.S., Liu, K.S.X., & Park, M. (2022). A scoping review on flipped classroom approach in language education: Challenges, implications and an interaction model. Computer Assisted Language Learning, 35(5 6), 1218 1249. https://doi.org/10.1080/09588221.2020.1789171
  52. Kashada, A., Li, H., & Su, C. (2017). Adoption of flipped classrooms in K-12 education in developing countries: Challenges and obstacles. International Journal of Emerging Technologies in Learning, 12(10), 147–157. https://doi.org/10.3991/ijet.v12i10.7308
  53. Katsa, M., Sergis, S., & Sampson, D.G. (2016). Investigating the potential of the flipped classroom model in K-12 Mathematics teaching and learning. In 13th international conference on cognition and exploratory learning in digital age. https://eric.ed.gov/?id=ED571429
  54. Kazu, İ.Y., & Kurtoğlu, C. (2020). Research of flipped classroom based on students’ perceptions. Asian Journal of Education and Training, 6(3), 505-513. https://files.eric.ed.gov/fulltext/EJ1267088.pdf
  55. Khan, S. (2012). The one world schoolhouse: Education reimagined. Hodder and Stoughton.
  56. Kiem, M.T., & Keodavan, X. (2024). Unpacking the advantages and challenges of flipped classrooms in initial mathematics teacher education in Vietnam. Eurasia Journal of Mathematics, Science and Technology Education, 20(5), em2437. https://doi.org/10.29333/ejmste/14449
  57. Khlaisang, J., Teo, T., & Huang, F. (2021). Acceptance of a flipped smart application for learning: A study among Thai university students. Interactive Learning Environments, 29(5), 772-789. https://doi.org/10.1080/10494820.2019.1612447
  58. Kissi, P.S., Nat, M., & Armah, R.B. (2018). The effects of learning–family conflict, perceived control over time and task-fit technology factors on urban–rural high school students’ acceptance of video-based instruction in flipped learning approach. Educational Technology Research and Development, 66(6), 1547-1569. https://doi.org/10.1007/s11423-018-9623-9
  59. Kline, R.B. (2011). Principles and practice of structural equation modeling (3rd ed.). Guilford Press.
  60. Limayem, M., Hirt, S.G., & Cheung, C.M.K. (2007). How habit limits the predictive power of intention: Theo case of information systems continuance. MIS Quarterly, 31(4), 705 737. https://doi.org/10.2307/25148817
  61. Listiqowati, I., Budijanto., Sumarmi., & Ruja, I.N. (2022). The impact of project-based flipped classroom (PjBFC) on critical thinking skills. International Journal of Instruction, 15(3), 853-868. https://doi.org/10.29333/iji.2022.15346a
  62. Lo, C.K., & Hew, K.F. (2017). A critical review of flipped classroom challenges in K-12 education: Possible solutions and recommendations for future research. Research and Practice in Technology Enhanced Learning, 12(4), 1-22. https://doi.org/10.1186/s41039-016-0044-2
  63. Long, T., Cummins, J., & Waugh, M. (2019). Investigating the factors that influence higher education instructors’ decisions to adopt a flipped classroom instructional model. British Journal of Educational Technology, 50(4), 2028-2039. https://doi.org/10.1111/bjet.12703
  64. Lounsbury, J.H. (2010). This we believe: Keys to educating young adolescents. Middle School Journal, 41(3), 52-53. https://doi.org/10.1080/00940771.2010.11461722
  65. Mardia, K.V. (1970). Measures of multivariate skewness and kurtosis with applications. Biometrika, 57(3), 519-530. https://doi.org/10.1093/biomet/57.3.519
  66. McDonald, T., & Siegall, M. (1992). The effects of technological self-efficacy and job focus on job performance, attitudes, and withdrawal behaviors. The Journal of Psychology, 126(5), 465-475. https://doi.org/10.1080/00223980.1992.10543380
  67. Menard, S. (2002). Applied logistic regression analysis. Sage.
  68. Ministry of National Education. (2020, April 1). Turkey is one of the two countries providing distance education at the national level during the coronavirus epidemic. Ministry of National Education. https://www.meb.gov.tr/turkey-is-one-of-the-two-countries-providing-distance-education-at-the-national-level-during-the-coronavirus-epidemic/haber/20618/en
  69. Naser, K.M.M., Halili, S.H., & Razak, R.A. (2021). Students’acceptance of using a flipped STEM classroom engineering-based module. JuKu: Jurnal Kurikulum & Pengajaran Asia Pasifik, 9(1), 20-28.
  70. Nouri, J. (2016). The flipped classroom: For active, effective and increased learning–especially for low achievers. International Journal of Educational Technology in Higher Education, 13(33), 1–10. https://doi.org/10.1186/s41239-016-0032-z
  71. OECD (2023). PISA 2022 results (Volume II): Learning during-and from-distruption. PISA OECD Publishing, Paris. https://doi.org/10.1787/a97db61c-en
  72. Østerlie, O., & Mehus, I. (2020). The impact of flipped learning on cognitive knowledge learning and intrinsic motivation in Norwegian secondary physical education. Education Sciences, 10(4), 110. https://doi.org/10.3390/educsci10040110
  73. Pallant, J. (2011). SPSS survival manual: A step by step guide to data analysis using SPSS (4th ed.). Allen & Unwin.
  74. Plageras, A., Xenakis, A., Kalovrektis, K., & Vavouyios, D. (2023). An application study of the UTAUT methodology for the flipped classroom model adoption by applied sciences and technology teachers. International Journal of Emerging Technologies in Learning (Online), 18(2), 190-202. https://doi.org/10.3991/ijet.v18i02.35585
  75. Polat, K. (2023). Perception of information technologies self-efficacy for secondary school students. Bayterek International Journal of Academic Research, 6(1), 142 156. https://doi.org/10.48174/buaad.1286998
  76. Rahman, S.F.A., Yunus, M., & Hashim, H. (2019). A technology acceptance model (TAM): Malaysian ESL lecturers' attitude in adapting flipped learning. Jurnal Pendidikan Malaysia, 44(1), 43-54. http://doi.org/10.17576/JPEN-2019-44.01SI-04
  77. Raykov, T., & Marcoulides, G.A. (2008). An introduction to applied multivariate analysis. Routledge. https://doi.org/10.4324/9780203809532
  78. Schmitt, N., & Kuljanin, G. (2008). Measurement invariance: Review of practice and implications. Human Resource Management Review, 18(4), 210–222. https://doi.org/10.1016/j.hrmr.2008.03.003
  79. Song, Y., & Kapur, M. (2017). How to flip the classroom – “productive failure or traditional flipped classroom” pedagogical design?. Educational Technology & Society, 20(1), 292–305. https://doi.org/10.3929/ethz-b-000128354
  80. Sopamena, P., Sangadji, K., Riaddin, D., Kaliky, S., & Assagaf, G. (2023). Effectiveness of flipped classroom model on mathematics achievement at the university level: A meta-analysis study. International Journal of Instruction, 16(1), 767-780. https://doi.org/10.29333/iji.2023.16143a
  81. Strayer, J. F. (2012). How learning in an inverted classroom influences cooperation, innovation and task orientation. Learning Environments Research, 15(2), 171–193. https://doi.org/10.1007/s10984-012-9108-4
  82. Tabachnick, B.G., & Fidell, L.S. (2013). Using multivariate statistics (6th ed.). Pearson.
  83. Tarazi, N. (2016). The influence of the inverted classroom on student achievement and motivation for learning in secondary mathematics in the United Arab Emirates: A quasi experimental study [Unpublished doctoral dissertation]. Northcentral University.
  84. Vandenberg, R.J., & Lance, C.E. (2000). A review and synthesis of the measurement invariance literature: Suggestions, practices, and recommendations for organizational research. Organizational Research Methods, 3(1), 4–70. https://doi.org/10.1177/109442810031002
  85. Vekiri, I., & Chronaki, A. (2008). Gender issues in technology use: Perceived social support, computer self-efficacy and value beliefs, and computer use beyond school. Computers & Education, 51(3), 1392-1404. https://doi.org/10.1016/j.compedu.2008.01.003
  86. Venkatesh, V., Morris, M.G., Davis, G.B., & Davis, F.D. (2003). User acceptance of information technology: Toward a unified view. MIS Quarterly, 27(3), 425-478. https://doi.org/10.2307/30036540
  87. Venkatesh, V., Thong, J.Y.L., & Xu, X. (2012). Consumer acceptance and use of information technology: Extending the Unified Theory of Acceptance and Use of Technology. MIS Quarterly, 36(1), 157–178. https://doi.org/10.2307/41410412
  88. Yang, H.H., Feng, L., & MacLeod, J. (2019). Understanding college students’ acceptance of cloud classrooms in flipped instruction: Integrating UTAUT and connected classroom climate. Journal of Educational Computing Research, 56(8), 1258–1276. https://doi.org/10.1177/0735633117746084
  89. Yıldız Durak, H. (2017). Turkish adaptation of the flipped learning readiness scale for middle school students. Bartın University Journal of Faculty of Education, 6(3), 1056 1068. http://dx.doi.org/10.14686/buefad.328826
  90. Waswa, D.W., & Al-Kassab, M.M. (2023). Mathematics learning challenges and difficulties: A students’ perspective. In D. Zeidan, J.C. Cortés, A. Burqan, A. Qazza, J. Merker, & G. Gharib (Eds.), Mathematics and computation: IACMC 2022 (Vol. 418, pp. 311 323). Springer. https://doi.org/10.1007/978-981-99-0447-1_27
  91. Wei, X., Cheng, I., Chen, N.S., Yang, X., Liu, Y., Dong, Y., & Zhai, X. (2020). Effect of the flipped classroom on the mathematics performance of middle school students. Educational Technology Research and Development, 68(3), 1461-1484. https://doi.org/10.1007/s11423-020-09752-x
  92. Winter, J.W. (2018). Performance and motivation in a middle school flipped learning course. TechTrends, 62(2), 176-183. https://doi.org/10.1007/s11528-017-0228-7
  93. Zeineddine, D. (2018). Investigate the effects of flipped learning on understanding of mathematics for secondary students. Journal of Mathematics Education, 11(1), 62 80. https://doi.org/10.26711/007577152790021
  94. Zhu, G. (2021). Is flipping effective? A meta-analysis of the effect of flipped instruction on K-12 students’ academic achievement. Educational Technology Research and Development, 69, 733–761. https://doi.org/10.1007/s11423-021-09983-6