<![CDATA[The purpose of this study was to analyze 1) the effect of the availability of laboratory facilities and infrastructure on the quality of physics learning; 2) the effect of the effectiveness of laboratory use on the quality of physics learning; and 3) the effect of the availability of facilities and infrastructure and the effectiveness of laboratory use simultaneously on the quality of physics learning. The method used in this study is a quantitative method with inferential statistics. The population was 6 classes of 11th grade science students with a total of 216 students and a sample of 3 classes of non-superior class XI students with a total of 108 people. The instrument trial was conducted on 36 students of class XI of SMA Negeri 2 Sidikalang, Dairi Regency so that it was known that all research instruments were declared valid and reliable because they had met the criteria for validity and reliability values. The data were collected with a closed questionnaire of 60 items. The results of the data analysis show that: 1) the F count value > F table is 63.412 > 3.07, thus it is known that the availability of infrastructure has a significant effect on the quality of physics learning at SMA Negeri 2 Sidikalang. The effect is 37.4%, 2) the F count value > F table is 59.917 > 3.07, thus it is known that the effectiveness of laboratory use has a significant effect on the quality of physics learning at SMA Negeri 2 Sidikalang. The effect is 36.1%, and 3) the F count value > F table is 48.120 > 3.07, thus it is known that the availability of infrastructure and the effectiveness of laboratory use simultaneously have a significant effect on the quality of physics learning at SMA Negeri 2 Sidikalang. The effect is 47.8%, thus Ha is accepted and H0 is rejected.]]>
