The results of the preliminary survey indicate that there are still many students who have not been able to solve the problem, the learning is still teacher-centered. For this reason, problem based and project based learning is implemented. The research aims to determine the differences of the student learning outcomes using Project Based Learning (PjBL) and Problem Based Learning (PBL) models in terms of self efficacy. The design of the research was quasi-experiment with 2×2 factorial design. The population is fifth-grade students of Elementary School (SD Kartika 1-11) in Padang, Indonesia. Sampling was done by cluster random sampling technique. The research instrument was a learning outcome test and questionnaire. Data were analyzed using two-way ANOVA. The results showed that: (1) the learning outcomes of students using the PjBL model were higher than the PBL model, (2) the learning outcomes of students who had high self-efficacy were better than low self-efficacy, (3) there is no interaction between learning models with self-efficacy on student learning outcomes.

Due to the COVID-19 pandemic spreading around the globe, it has affected many fields of human life, including educational services. It has been closed for months to eradicate the transmission of its virus. Corresponding to the situation, which changes dramatically, the educational institutions made some transformations and innovations to keep the class and instructional running safely for all by moving the regular sitting class face-to-face to online learning. Educational institutions, as well as podcasts, have developed several online learning media. This study explored the students' attitudes and preference towards creating content for online learning materials/ content by utilizing podcasts in innovative learning through an online survey of 84 students. The study results showed that most respondents (80%) stated that they were about to be enthusiastic, welcoming a new pattern of the instructional process by applying podcasts to develop subject content. The findings show the respondents’ attitudes and perceptions toward Podcast Content Development for Smart Learning are very positive with efficiency (80%), accessibility (90%), interactivity (90%), quality (82%).  They preferred to access online learning materials by maximizing the smartphone as its effective and efficient reason. They tend to have brief and meaningful content considering the size and broadband connectivity to achieve flexible and convenient online classes for smart learning

One of the innovations needed to create lightweight wall is possible by using Styrofoam as a partially fine aggregate substitution. This study was conducted to study the flexural strength of Styrofoam lightweight concrete panel walls with a high-volume fly ash content in a square column connection. Methodology: The size of the wall panel used is 120 x 30 x 10 cm with 10 x 10 cm square column holes as support on both sides. In the centre of the wall panel, four square holes with a dimension of 18 x 4 cm were created. The variations of fine aggregate replacement with Styrofoam were 50% and 60% by the volume of fine aggregate, while the use of Fly ash is 50% as partially cement substitution. SCC (Self Compacting Concrete) method was used to manufacture this kind of concrete. Results: The results of Slump Flow T50 test for 50% and 60% Styrofoam variations are 64 cm and 59 cm, while the concrete weight-volumes are1387.7 kg/m 3 and 1259.4 kg/m 3. Compressive strength test for both variations are 42.62 Kg/cm 2 and 31.71 kg/cm 2. Stiffness values for both variations are 1434.7 N/mm and 1125 N/mm. This study also analysed the maximum length of the panel wall in which for 50% Styrofoam variation is 4 m and 60% Styrofoam variation is 3.2 m. Applications/ Originality/ Value: Research on Styrofoam concrete hollow panel walls incorporated with high volume fly ash is significant since it opens the possibility to reduce the Styrofoam waste.

This Research is aimed to find out the effectiveness of game based learning multimedia in order to gain student learning outcomes on English subject with the topic of grammar in the classroom. The research development of multimedia game based learning using the procedure of Raiser and Demsey consisting of 5 stages namely: 1) Analysis which covers needs and theoretical analysis, 2) Design which includes Core and basic competence’s identification, material’s selection and submission, flowchart and story board arrangement, 3) Develop that contains production, media and material’s experts validation and students’ responses and product’s trial after the revision done. 4) Implement that covers the final product’s application towards the experiment class, 5) Evaluate becoming the last stage of all by having a test for both classes which are control and experiment class to see whether is there any differences between the class applying the multimedia game based learning and not. The trial of product development tested had passed several processes covering; the review from media’s expert which includes software changes and visual communication, the review from content’s expert covers material and instructional design, students’ responses towards products’ usage and attractiveness, small group and big group test trial. The result showed that the students at the control class taught by conventional way as in speech has less motivation and lower score compared with the experiment class applying interactive multimedia game based learning. There is an interaction between learning media and learning motivation those effects on students’ learning achievement especially in English grammar. Thus, it can be said that the result of the development of multimedia game based learning is effective to improve students learning outcomes.

Abstract. High volume fly ash concrete becomes one of alternatives to produce green concrete as it uses waste material and significantly reduces the utilization of Portland cement in concrete production. Although using less cement, its compressive strength is comparable to ordinary Portland cement (hereafter OPC) and the its durability increases significantly. This paper reports investigation on the effect of design strength, fly ash content and curing method on compressive strength of High Volume Fly Ash Concrete. The experiment and data analysis were prepared using minitab, a statistic software for design of experimental. The specimens were concrete cylinder with diameter of 15 cm and height of 30 cm, tested for its compressive strength at 56 days. The result of the research demonstrates that high volume fly ash concrete can produce comparable compressive strength which meets the strength of OPC design strength especially for high strength concrete. In addition, the best mix proportion to achieve the design strength is the combination of high strength concrete and 50% content of fly ash. Moreover, the use of spraying method for curing method of concrete on site is still recommended as it would not significantly reduce the compressive strength result.