"extra readings" is a grammatically correct and usable phrase in written English.
You could use this phrase to refer to additional materials or resources that a student is expected to read for a class or for additional research on a particular topic. For example, "The professor assigned us extra readings on the French Revolution to better understand the political context of the time."
The BBC initially said the number of short stories would be "reduced from three to one a week on Radio 4", with extra readings on digital station, BBC Radio 4 Extra.
My response to such intransigence was to introduce extra readings for the class - from DuBois on Black Reconstruction, to Michelle Alexander on the new Jim Crow - to discuss those texts in detail, and to offer connections with the show.
You should prepare for classes by doing the required readings, along with some extra reading around the topic under discussion.
However, if more exciting and relevant required readings were implemented in school curriculums and extra reading on the side was encouraged more, literacy would jump exponentially.
Although a video monitor in the control room that normally displayed the position of nearby ships was out of order, he neglected to discuss this with his senior officers, or order extra attention to readings in the sonar room to make up for the missing video display.
Supplementary boxes within the handbook provide more information to readers in the form of tips, extra information, further readings, and chapter highlights.
The 290 colleges that have adopted extra-curricular common readings have, with only a handful of exceptions, settled for pretty lightweight reading.
The identified hot nodes were excised and extra-corporal control readings were performed.
Reading extra information helps.
Ms. Sherman changed that with $240,000 in grants over the last nine years, enabling the Independence Foundation New Play Showcase to pay for local workshops, readings and extra rehearsal time for 17 works.
In fact, Arsenal have won all 12 of their competitive meetings with Reading (including extra time), and it would be no surprise to see Arsenal score a fair few goals in a dominant win.
