The module is a book written with the aim that students can learn independently and in the module contains the basic components of teaching materials so that students can understand easily. The advantages and disadvantages of the module are that students can learn independently using the module and the teacher is no longer the only source of learning for students. Education has used various ways in theteaching and learning process. One of the general users of website users in public schools is the use of web-based learning aplications that contain tutorials, exercises or vidios that are developed and uploaded to web. 

The growth rate of internet users in recent years has increased very rapidly and is growing rapidly. This triggers the creation of a new business model in the form of a marketplace that is used to buy and sell goods. This study aims to load an online store that is simple and lightweight but can meet the needs of sellers who use this website.
Application development uses methods while the prototype in modeling the application uses use case diagrams, class diagrams, activity diagrams, and sequence diagrams. The research is expected to produce a web-based marketplace application that facilitates the transaction process of consignment providers and consumers at the Indonesian Helmet Shop.
Furthermore, the design of this messaging service application prototype still needs to be developed in terms of user interface and user experience so that consumers can be more comfortable in transacting.

ABSTRACT
A web-based futsal field reservation system was developed to help facilitate the process of booking or leasing a futsal field. The system uses PHP and HTML programming languages by using MySQL as data storage. The purpose of designing this system is to make it easier for users to rent futsal fields. With the futsal field reservation system is expected to facilitate in data processing, scheduling and registration of members or customers. In the end, this system is expected to help the company's performance, and can also facilitate customers in the ordering process.