1. A computer-implemented method for enabling learner billing of time-limited access to one or more learning content modules, one or more time-limited tangible tutoring services, time-limited access to one or more tangible learning facilities, or time-limited access to one or more learning tools in a learning system, the learning system including one or more processors and a plurality of user computing devices, the plurality of user computing devices being remotely linked over a computer network through a network interface device configured to perform functions enabling communication to and from the computer network via a mobile or browser-based web application, a computer desktop application, an electronic module or subsystem of a social networking environment, an electronic learning content management system, a professional networking environment, an electronic commerce system, an electronic payments system, or an Internet-based website, each of the plurality of user computing devices including an electronic user interface and an electronic display, the one or more processors configured with one or more computer-implemented modules or generators including a learner billing module, a billing cycle module, a microlearning purchase management module, a performance management module, an aggregation module, a learning plans adjustments module, a billing adjustments module, a service usage timing module, a prepaid balance module, and a bill interface generator, at least one of the one or more modules or generators including at least one learning database with learning data arranged in data fields, the method comprising steps of: displaying a time-limited access control interface on the electronic display of a user computing device of a learning user through the network interface device, the time-limited access control interface including an option to purchase microlearning items each associated with a pre-determined billable usage value per unit of time including time-limited access to at least one learning content module, the learning content module comprising instructional content and associated electronic media related to the instructional content or at least one of the plurality of metadata associated with the learning system, or time-limited access to at least one tangible tutoring service, or time-limited access to at least one tangible learning facility, or time-limited access to at least one tangible learning tool; accepting a selection from the learning user associated with the user computing device via the electronic user interface for time-limited access to least one learning content module or time-limited access to at least one tangible tutoring service or time-limited access to at least one tangible learning facility or time-limited access to at least one tangible learning tool via the network interface device; granting time-limited access to at least one learning content module or time-limited access to at least one tangible tutoring service or time-limited access to at least one tangible learning facility or time-limited access to at least one tangible learning tool via an electronic access control interface on the user computing device associated with at least one learning user or at least one tutoring user or at least one learning facility administering user via a performance management module at multiple dates and times, and recording the duration, dates, and times of all time-limited accesses as a variety of access events; monitoring, via the service usage timing module, via an electronic access control interface on the user computing device associated with at least one of the learning user, tutoring user, or learning facility administering user, time-limited access by the learning user to at least one learning content module, to at least one tangible tutoring service, to at least one tangible learning facility, or to at least one tangible learning tool, at different dates and times, and recording the duration, dates, and times of each time-limited access as a variety of billable usage events; receiving, via the bill interface generator, a billing cycle completion reminder from the billing cycle module at a predetermined time after the completion of a user billing cycle; receiving, via the bill interface generator, an electronic bill generation request for at least one time-limited access event or at least one time-limited billable usage event from the billing cycle module for the completed billing cycle; determining, via the microlearning purchase management module, a plurality of microlearning items purchased by the learning user in the billing cycle, the plurality of microlearning items including time-limited access to at least one learning content module, or time-limited access to at least one tangible tutoring service, or time-limited access to at least one tangible learning facility, or time-limited access to at least one tangible learning tool being included in the learning data and retrieved from respective data fields of the learning database; determining, via the microlearning purchase management module, a pre-determined billable usage value per unit of time for the purchased or accessed microlearning items including time-limited access to at least one learning content module, or time-limited access to at least one tangible tutoring service, or time-limited access to at least one tangible learning facility, or time-limited access to at least one tangible learning tool, wherein the unit of time includes at least one of seconds, or minutes, or hours or days, computing, by the aggregation module, pro-rated billable usage values of microlearning items accessed by the learning user in the completed billing cycle to determine the aggregate pro-rated billable usage value due from the learning user, wherein the computing includes consolidating the variety of learning content module access events as a first consolidated billing item and the variety of billable usage events as a second consolidated billing item; determining, by the billing cycle module, if a prepaid value is previously associated with the learning user; determining, by the prepaid balance module, the prepaid value and balance pro-rated billable usage value after adjustment of prepaid value against aggregate billable usage value for the completed billing cycle; and displaying, by the bill interface generator, an electronic learner bill designating at least one of an itemized or aggregate a zero or non-zero balance pro-rated billable usage value on the electronic display of the user computing device operated by the learning user, the balance pro-rated billable usage value being based on the first consolidated billing item and the second consolidated billing items, and any adjustments by the billing adjustments module to the balance pro-rated billable usage value due.
4. The computer-implemented method of claim 1 , wherein the cost of microlearning items is determined based on a tax rate applicable to the microlearning items.