The phrase "a substantial and ongoing" is correct and usable in written English.
It can be used to describe something that is significant in size or importance and continues over a period of time.
Example: "The organization has made a substantial and ongoing commitment to environmental sustainability."
Alternatives: "a significant and continuous" or "a considerable and persistent".
However, online schools will be as good as their classroom peers only if they are large enough to afford a substantial and ongoing investment.
This notion of progression through the stages of transition is the subject of a substantial and ongoing debate; such stage-wise linear approach to change is a major shortcoming of these concepts.
Thus, while this study has various limitations (addressed below), we nonetheless believe it is an important - if modest - first step in what is typically a substantial and ongoing process [ 18] of model validation.
"The garden bridge has gone from being a 100% privately funded project to one with a substantial and possibly ongoing cost to the taxpayer," Hurst told the Guardian.
As might be expected for a crop and its wild relative (Zohary 1984), the present study revealed substantial and ongoing gene flow among P. dulcis and P. orientalis.
"This action seeks to redress the substantial and ongoing pattern of fraudulent misrepresentations and deceptive sales practices" by the Trumps and the other defendants, the suit charged.
"The United States welcomes the substantial and ongoing releases of prisoners in Cuba - so good to see people reunited with their families," he wrote.
"BP had clear policies requiring preservation of evidence in this case and has undertaken substantial and ongoing efforts to preserve evidence," the company said.
"The United States welcomes the substantial and ongoing releases of prisoners in Cuba – so good to see people reunited with their families," he wrote.
"But given that he has substantial and ongoing business interests, it's important that he avoid not only actual conflicts, but even the appearance of conflicts of interest".
