Changes

=== Journal objects ===

=== Journal objects ===

Objects that were created in process of using Shared Actions. After being initially created, such objects will be singular, i.e., if teacher created an Calculate activity object "How to learn tangent function", all students will work with the same object but server will keep (implicitly) per student copies of "How to learn tangent function" object and any particular student will see only his own copy but teacher will manage to see all variants to track what students do.

Objects that were used in process of using Shared Actions. After being initially created, such objects will be singular, i.e., if teacher created an Calculate activity object "How to learn tangent function", all students will work with the same object but server will keep (implicitly) per student copies of "How to learn tangent function" object and any particular student will see only his own copy but teacher will manage to see all variants to track what students do.

Shared objects' state might be also per action, i.e., all shared objects might be reused in several actions. For example, "How to learn tangent function" might be used in two actions, the action that represents class time when teacher explained the topic and in another action that represents student's home work that was given by teacher in the class. In all cases "How to learn tangent function" is the same object but it has two sorts of states, for class time action and for home work action. Such per-action behaviour might be useful since it represents learning process history.

Shared objects' state might be also per action, i.e., all shared objects might be reused in several actions. For example, "How to learn tangent function" might be used in two actions, the action that represents class time when teacher explained the topic and in another action that represents student's home work that was given by teacher in the class. In all cases "How to learn tangent function" is the same object but it has two sorts of states, for class time action and for home work action. Such per-action behaviour might be useful since it represents learning process history.