According to the Performance Level Descriptors for Grade 4 Reading, Connecticut Mastery Test (PDF file, Connecticut State Department of Education), the following is a characteristic of advanced 4th grade readers:
- Consistently discuss and respond to texts by making text-to-self, text-to-text and text-to-world connections that are supported by relevant information from the text
Beep, beep, beep. Text to self, text to self: incoming word, incoming word.
As far as text to world, isn't that Twitter?