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Catering for students' needs and assessing their work are pedagogically fundamental issues. Teachers try to provide for different learning styles, to address differentiation and to regularly evaluate students' progress by formative assessments. However, large classrooms hinder proper teaching and giving timely feedback (Carless, 2007). Thus, overwhelmed teachers, who hardly find time to give detailed feedback, struggle to create interesting classrooms where students are involved and motivated.

In order to help solving such problem, the flipped classroom approach is applied. Students are given material to study at home, and class time is employed for application and assessments. This helps teachers to dedicate more time for students' queries and practice. In this approach, Tackk is used for explanation and Socrative is used for e-formative assessments.

Tackk, is a website for designing material; it allows teachers to provide texts, photos and media in one canvas with one URL. Hence, one lesson material can cater for different learning styles. Students also are involved in the learning process, as materials are designed in an up-to-date method, due to using technology, which students prefer and are aware of (West, 2013 as cited in Nielsen & Webb, 2015).

Socrative, in addition, is another website used by teachers to assess students' understanding and achievement. It motivates students and helps teachers provide instants grades and feedback. It also enables teachers to save grades, assess specific information and create engaging classrooms where students can use their cell phones to participate and receive real time responses. Students find using cell phones in learning to be enjoyable and motivating (Al- Fahd 2009); moreover they benefit from the prompt and comprehensive feedback as well as the flexibility provided by the online quizzes (Baleni, 2015).

After trying the flipped approach with Tackk and Socrative, the delivered material becomes engaging and suitable to different learning styles; besides the assessments are easily and effectively done. In addition, students' feedback to this approach was encouraging as reflected in their eagerness to solve quizzes using mobile phones or tabs. Therefore, the flipped approach with Tackk and Socrative helps teachers and engage students in large classrooms.