The World Health Organization (WHO) COVID-19 is an infectious disease caused by the Coronavirus which originally came from an outbreak in the city of Wuhan, China in December 2019 which later became a pandemic that occurred in many countries around the world. This disease has caused the government to give a regional lockdown status to give students the status of "at home" for students to enforce online or online lectures, this has caused various sentiments given by students in responding to online lectures via social media twitter. For sentiment analysis, the researcher applies the nave Bayes algorithm and support vector machine (SVM) with the performance results obtained on the Bayes algorithm with an accuracy of 81.20%, time 9.00 seconds, recall 79.60% and precision 79.40% while for the SVM algorithm get an accuracy value of 85%, time 31.60 seconds, recall 84% and precision 83.60%, the performance results are obtained in the 1st iteration for nave Bayes and the 423th iteration for the SVM algorithm

Activities practicum is one of the methods that is in a process learning that can train student's ability of cognitive, psychomotor, and affective. A long with the development of science and technology there are various media come that can amenable a learning process. Currently, most of educational institutions do the practicum is still using a conventional method. This article is designed by using the study literature method which aims to introduce a practicum method with media. Hopefully, the media are able to improve accuracy and conscientiousness in the process of observation. To support the learning process, the evaluation method used is also used the same media. Media are used in the form of a set of the electronic devices that is based microcontroller. Microcontroller is a chip in the form of IC that can receive input signals, process it and give output signals based on a program loaded into it. The function of microcontroller is as a microprocessor that read analogue data that is in practicum activities, translate it into digital data and then displayed on LCD screen computer until produce observation data effectively and efficiently. So do the evaluation process. 

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