Development of Virlenda-Based Blended Learning with Problem Based Learning Strategy for Problem-Solving Ability for Students

: This study aims to develop a Virlenda-based blended learning model. The products that will be produced develop learning tools with problem-based learning strategies, problem-based evaluation tools, supplements for lecturers and students and the Virlenda learning management system as a forum for carrying out the learning process. The results of the research are design experts with 85.8% validation percentage, material experts with 86.5 validation percentages, media experts with 87.7% validation percentages, 86.5% validation percentages for colleagues. In the small group trial the percentage of responses was 82.7%, for the medium group trial the percentage of responses was 89.6%, while in the large group trial the percentage was 92%. The results of the products developed can be used as guidelines in the learning process, so that products can be mass-produced to be distributed to universities. In the field group trial comparing the old model and the new model, it got 0.458 for Google Classroom and 0.916 for Virlenda, so Virlenda is significantly better than Google Classroom. Abstrak: Penelitian model blended learning validasi 86,5,

1838 Jurnal Pendidikan, Vol. 6, No. 12, Bln Desember, Thn 2021, Hal 1837-1845 from sources, it is also used to communicate with other learners and learners (Smaldino, Lowther, Russell, 2011). Online has the ability to convey any information, so that anyone can access electronic documents to enrich their studies, and the most important thing is that students can interact with online learning by providing an interactive environment. (Fatirul, 2020).
According to Carman (2009), there are 5 main keys in implementing blended learning model learning, namely: Live Event, Self-Paced Learning, Collaboration, Assessment, and Performance Support Materials. The diversity in this model is clear that blended learning focuses on synchronous and asynchronous learning, combining independent (individual) and group learning, prioritizing collaboration, always conducting combined assessments, using many sources. Kwang at.al. (2020) expressed the effectiveness of the blended learning model in the learning process, there are many advantages that we can get to improve student performance, learn individually, and improve students' thinking skills significantly. Alder and Milne (1997) call problem based learning a method that focuses on identifying problems that make up the framework of analysis and solutions. This method is done by creating groups whose performance is carried out in collaboration, discussing things that are not or poorly understood and sharing roles to carry out tasks and report to each other. Wheeler, at al. (2005) said that problem-based learning presents many problems in the form of real problems. White (2001) argues that the problem-based learning method is the most effective method in improving problem-solving skills. Then Arends (2007) outlines that teacher always present authentic problems to students which later students can investigate which increases inquiry that trains children's intellectuals which is carried out openly and to whomever students communicate. White, (2001) makes it clear that in problem-based learning collaborative work is more important which will improve communication skills, increase motivation to learn and be responsible for the results of their work.
This theory underlies that problem-based learning strategies are more effective than other learning strategies (Fatirul, 2012). In carrying out this research, the researcher will refer to the syntax proposed by Arend (2007), the steps or syntax include Provide orientation on problems to students, organize students for research, assist independent and group investigations, Develop and present artifacts and exhibits, and analyze and evaluate the problem-solving process. Ahmet at.al. (2007) and Xiaojie Ding at.al. (2014) argues that PBL achieves a high score, makes learning more effective, can motivate students, can improve independent learning, and can improve knowledge, attitudes, and skills. How this learning model is also applied in online learning, of course, requires a forum known as a Learning Management System (LMS). Many LMS have developed in recent times. PGRI Adi Buana University Surabaya along with this progress has designed a special LMS with the name VIRLENDA. Virlenda is in carrying out a learning process that is not the same as other LMS on the internet such as Google Classroom. This LMS is specifically designed to bridge the learning process in the PGRI Adi Buana University Surabaya. In the LMS Virlenda has been made complete and detailed how to accommodate lectures to help students lecture comfortably with easy access or easy to follow. Virlenda is designed by prioritizing easy access for students and lecturers so that the learning process can be carried out properly. This opportunity to create real-life learning experiences and promote student collaboration as they acquire and strengthen skills of independence, and self-management are among the skills students need for lifelong learning that they can apply across disciplines and global law environments (Ian McCall, 2020). There are several factors that can be considered when using LMS for teaching and learning purposes, namely attitudes towards using LMS, factors related to the environment around faculty members and its characteristics that encourage or hinder faculty members to use LMS. become more critical of the effect of using LMS (Asiri & Mahmud, 2012).
This study provides the necessary insight into how a particular mode of learning delivery is a key factor in sustaining student learning performance and promoting lifelong learning. Shakeel. Qureshi (2011) The most desirable teaching methods that need to be supported by LMS are group problem solving, discussion-based strategies, problem-based learning, and simulations. I Ketut Darma at.al. (2019), the Blended learning model supported by multimedia learning media improves performance assessment based on portfolio and self-assessment. Sofia at.al. (2015) LMS system under mixed learning modality can efficiently support Online Learning Environment in Higher Education Institutions.
This learning model that has many benefits invites all lecturers to use the blended learning model as a forum and form of learning in the future. This reason cites the opinion of Fatirul (2020) that the teacher's task is not finished after the teacher conducts face-to-face learning, but to facilitate the learning of their students, they can continue with online learning. Besides this model has an impact on students in their learning, it will also be able to improve abilities and make it easier for lecturers to carry out their learning processes such as being able to create more effective, efficient, and interesting learning patterns according to the interests of students and can improve teaching skills for teachers in dealing with different students. Hasmunarti: 2018, Jong at.al.: 2016, Donnelly: 2010. This clarity indicates that the learning process can be carried out using a blended learning model, so that with a blended learning model our students will further increase communication and collaboration activities among friends, satisfaction (Donnelly: 2010, Jong at.al.: 2014.
This problem-based learning strategy will expand the use and increase the accessibility, flexibility, and comfort that students expect from higher education in the digital era so that students can feel satisfied in carrying out the learning process (Hazwanie, 2017,). With the problem-based learning strategy that we use, it will save learning time so that learning can be more effective, think creatively and critically (Manwa at.al, 2013, Donnelly, 2010, Yun-Jo at.al., 2013.

METHOD
This research is development research that aims to develop learning tools with a blended learning model based on Virlenda by using problem-based learning strategies to improve students' thinking skills. The research model uses the Borg and Gall research model (1983) while product development is carried out using a learning system development model with the Dick and Carey model (2001).
This research was conducted on undergraduate students at PGRI Adi Buana University Surabaya on undergraduate students of English, Physical Education and Elementary School Teacher Education with a total sample of 399. The trial was conducted by involving 2 learning design experts, 2 material experts, 2 media experts, and 2 peers. Meanwhile, to test the feasibility of the developed product, it was carried out on 10 students as a small group trial. Limited group trials were conducted on 65 students. Meanwhile, the field trial group was carried out on 100 students.
The data collection was carried out using a questionnaire which included a questionnaire for all test subjects including expert validation. This questionnaire was prepared by containing several aspects regarding ease of access, strategies used and attractiveness. Data analysis will be carried out using descriptive statistics of percentages, while to determine the level of proficiency in student thinking is done by looking at the application of the old model by using the Learning Management System with Google Classroom. Learning outcomes will be seen from the test results of each model used. The validation results from 2 design experts from 5 aspects measured were obtained for the material presentation design aspect to get a percentage of 84.6%, for the instructional aspect of each material presentation a percentage of 86%, for the aspect of the suitability of the material with the PBL learning strategy a percentage of 88%, for The aspect of the density of the material presented obtained a percentage of 86.7% and for the aspect of the suitability of the evaluation with the PBL learning strategy it was 84%. The total assessment of the developed product obtained a percentage of 85.8%, this indicates the product developed is feasible to be used in the learning process. The validation results from 2 material experts from 4 aspects measured were obtained for the aspect of material presentation density obtaining a percentage of 86%, for the aspect of the suitability of the material with the PBL learning strategy a percentage of 84%, for the convoluted aspect of the presentation material a percentage of 89%, and for the evaluation suitability aspect with the PBL learning strategy obtained 87%. The total assessment of the developed product obtained a percentage of 86.5%, this indicates the product developed is feasible to be used in the learning process. The validation results from 2 media experts from 4 aspects measured were obtained for the virlenda design aspect, obtaining a percentage of 89%, for the aspect of completeness of the virlenda menu, it obtained a percentage of 88%, for the ease of access aspect, the percentage was 88%, and for the attractiveness aspect of virlenda, it was 86%. The total assessment of the developed product obtained a percentage of 87.7%, this indicates the product developed is feasible to be used in the learning process.

Media Expert Test
Peer Test Attractiveness 5 87% Total 20 The validation results from 2 colleagues from the 4 aspects measured were obtained for the aspect of completeness of the material presentation to obtain a percentage of 86%, for the aspect of the continuity of the presentation material a percentage of 89%, for the aspect of conformity with the evaluation of the PBL learning strategy a percentage of 84%, and for the attractiveness aspect, it was obtained 87%. The total assessment of the developed product obtained a percentage of 86.5%, this indicates the product developed is feasible to be used in the learning process. The results of the trial in a small group with a total of 5 respondents from 5 aspects measured were obtained for the attractiveness aspect of virlenda obtaining a percentage of 83.7%, for the ease of access aspect a percentage of 84.9%, for the aspect of clarity of the material presented a percentage of 83%, for the aspect of The attractiveness of the presentation of the material received a percentage of 82%, and for the attractiveness aspect of the problem-based evaluation it was 80%. The total assessment of the developed product obtained a percentage of 82.7%, this indicates the product developed is feasible to be used in the learning process in trials in moderate or limited groups. The results of the trial in the moderate or limited group with a total of 5 respondents from 5 aspects measured were obtained for the attractiveness aspect of virlenda, it obtained a percentage of 90%, for the aspect of ease of access, it was 89%, for the aspect of clarity of the presentation material, it was obtained a percentage of 89%, for the aspect of display attractiveness. the presentation of the material obtained a percentage of 90%, and for the aspect of attractiveness the problem-based evaluation obtained 90%. The total assessment of the developed product obtained a percentage of 89.6%, this indicates the product developed is feasible to be used in the learning process in large group trials. The results of the trial in a large group with a total of 5 respondents from 5 aspects measured were obtained for the attractiveness aspect of virlenda, a percentage of 91% was obtained, for the ease of access aspect, a percentage of 92% was obtained, for the aspect of clarity of presentation material, a percentage of 90% was obtained, for the aspect of the attractiveness of the presentation of the material. obtained a percentage of 94%, and for the attractiveness aspect of the problem-based evaluation obtained 93%. The total assessment of the developed product obtained a percentage of 92%, this indicates that the product developed is feasible to be used in the learning process. This product can be mass-produced to be known and used as a guide in carrying out the learning process, thus it can also be said that the development of blended learning with problem-based learning strategies to improve students' thinking skills in facing the world of work can be used as guidelines in the use of learning models and strategies. For large group trials, experiments were also conducted to determine the effectiveness of students' thinking skills between the old model and the new model. From the experimental results obtained as in table 8 below: 458. This indicates that the effectiveness in terms of problem-solving skills for LMS Virlenda students is significantly better than LMS-Google Classroom.

DISCUSSION
All the results carried out in this study received very positive responses from all experts, lecturers, and students. All designs developed also have a main place for students who can carry out the learning process easily. This indicates that the demands of the KKNI-based curriculum in Indonesia developed in universities are the main requirements and have a close relationship with the designs that are made very supportive of the demands of the curriculum and the demands of the 21st century in the industrial era 4.0, so that later it is hoped that the mastery of student competencies is in accordance with the demands of the world. work. This becomes very important for students to be able to communicate and collaborate with teachers when students find difficulties in understanding the learning material provided by the teacher so that it can also improve the ability to solve problems for students. To facilitate communication and collaboration in the learning process, teachers and students are facilitated by using WhatsApp groups to bridge and provide information from lecturers. Of course, the above is not enough, students in online learning can express their search for knowledge in all sources on the internet. This learning prioritizes diversity in problem solving given by the teacher.
The learning process in the 21st century, whether there are world events about the Covid-19 virus that is developing or the absence of these events, learning should refer to the learning process that refers to the blended learning model, but no matter how good the learning model is if it is not supported by the right learning method or strategy then what happens is an ineffective learning process. In accordance with this, to support graduates with the world of work is very much needed. What it means is that the theory presented is not applied to real problems that are developing. Therefore, the right method or strategy is to use problem based learning strategies. Besides being the demands of the 21st century and the demands of the curriculum, problem based learning strategies bring benefits to students about their way of thinking, communication and collaboration models, and can improve problem solving skills in the field.
The model presented is using a problem-based learning strategy, all materials that will be presented to students of course require a forum for students to get all the materials presented by the lecturer. Learning Management System is a development in the world of technology that has developed for a long time, but often universities in Indonesia do not use it well. There are many learning management systems available on the internet, such as Google Classroom and so on. Can this LMS bridge the implementation of the learning process in higher education? With this demand, Universitas PGRI Adi Buana Surabaya designed a learning management system that is oriented towards convenience by studying the available LMS according to student needs. This learning management system is named Virlenda. PGRI Adi Buana University Surabaya will make the university a digital campus. This is the basis for designing the LMS Virlenda to make it happen and according to the recommendations of the 21st century and the demands of the curriculum in Indonesia.
As an appeal that universities everywhere can design a learning management system independently to accommodate the learning process properly. Several studies that support this research have been produced on LMS, blended learning and problembased learning.
There are many benefits of using LMS from previous research conducted by Norhaiza Khairudin at.al. (2016), Aparecido Fabiano at.al. (2008 that with LMS learning will be more effective and to help increase IT knowledge among lecturers. And online learning effectively and supports student communication in the learning environment. Student participation in collaborative and interactive learning, academic integrity and the degree of student interaction and involvement in the distance learning process are all considered important criteria in making the decision to adopt an LMS. Another study by Hamzarudin Hikmatiar at.al. (2020), Oka Agus Kurniawan Shavab at.al. (2018 with the use of LMS, many students received positive responses. and have a good impact on learning outcomes. LMS shows a very good average validation, so it can be said that it is feasible as a learning medium. Another case is done by Mohammed at.al. (2012), Untung Raharja at.al. (2016), Natasa Hoic-Bozic at.al (2009 that LMS can improve the quality of learning. Encouraging students to be more interactive, eliminating the limitations of time and space in the learning process and with LMS will improve learning outcomes and can participate in learning process activities anywhere and anytime. Therese H. Federl (2020), The use of LMS can be of interest to teachers, institutes and faculties. This can help them structure the course pages to provide a better experience for students.
Another finding about the blended learning model which is supported by previous researchers conducted by zgen Kormaz at.al (2009), Wing Sum Cheung and Khe Foon Hew (2011), the blended learning model contributes more to students' attitudes towards courses and students have more thinking Critical thinking that stands out means that the higher the student's attitude, the higher the student's way of thinking. Ron Oliver (2005), Findings from research that a problem-based teaching approach delivered using blended learning provides strong support for students, influences student satisfaction levels and can explore strategies where such settings can cater more broadly to all students in large classroom settings. The blended learning model combined with the problem-based learning strategy of previous research can have benefits for students' abilities such as the research conducted by Siti Azizaha at.al. (2017), Stefan Moeller at.al. (2010). Student learning activities using problem-based internet media have increased student activity in learning and there is a significant difference in increasing learning outcomes between classes that use internet media and classes that do not use internet media and the Communication Quality of PBL learners is superior. Heru Raharjo at.al. (2018) 2018), learning outcomes using PBL have high motivation, students' higher-order thinking and improve their achievement and results. Integration of PBL with online can increase motivation, scientific communication, and high learning and creativity skills with the interaction in PBL learning strategies and Mary Beadle & Julie Santy (2008), Modules or teaching materials are delivered using a problem-based learning approach with a blended learning model to support students in the learning process. With this support, the results of this study can lead to the benefit that the LMS which is packaged with a blended learning model and problem-based learning strategy has clearly proven that the learning process in schools or colleges anywhere can be the rationale for being able to package learning using LMS, blended learning. with a problem-based learning strategy. This will bring students to work-ready outputs.

CONCLUSION
The blended learning model which is the focus of the learning model to develop the recommended product is one of the learning models. No matter how good the learning model is without being followed by the right learning strategy, the learning process will not be effective. The blended learning model using a problem-based learning strategy based on Virlenda that was developed is proven to be able to improve students' thinking skills more prominently than using other LMS models which in this case are based on Google Classroom. This is evidenced by the response in the use of the developed product to get a very positive response from students who get a percentage of 92% and the comparison of scores in students' thinking skills gets a better increase in abilities than the google classroom-based model. Thus Virlenda's learning management system has been proven to be able to facilitate the implementation of the learning process at PGRI Adi Buana University Surabaya very impressively which is supported by a blended learning model using problem based learning strategies that make the learning process more effective, efficient, and attractive to students. It is an expectation that all universities wherever they are can build a learning management system independently which is designed according to the needs of each university by not forgetting to pay attention to the characteristics of each student who has a unique variety. Thus, the university can carry out the learning process independently to go to a digital campus that has potential and is oriented towards the development of science and technology.