The Toronto District School Board (TDSB) implemented a similar ban but it was reversed four years later.
The ban comes on the heels of a public consultation conducted past year.
Cellphones, she said, are often used in classrooms to gauge student readiness, for educational purposes, including taking photos for presentations, and to assist students with learning needs.
Details of the new policy are expected in an official announcement within the next week.
The Ontario Principals' Council said school boards have already developed policies around cellphone use and the council does not support a further ban.
In a statement, Minister Lisa Thompson was quoted saying "Ontario's students need to be able to focus on their learning - not their cellphones".
This proposed regulation will strictly prohibit the use of cellphones during instructional periods.
"They're good technology and can be used for educational purposes", says Fields.
Ontario has made a decision to ban cellphones in classrooms, but Alberta is not ready to make that call.
"I think that it's time for the government to take back the power and give it back to the teachers inside the classroom", says Kehoe.
The government said teachers and parents overwhelmingly supported banning cellphone use during telephone town halls and surveys conducted last fall, in which 97 per cent of the 35,000 respondents advocated for the move.
Thompson announced additional money for school boards and training for teachers Monday as hundreds of kids may soon enter school because they will get less funding for therapy.
"Students need to be discerning digital citizens and opportunities should be provided within the curriculum to allow students to safely explore various uses and risks of technology in an intentionally guided and supportive environment", the association wrote.
"There are still fundamentals that teachers aren't able to perform their daily tasks of teaching [to] children because there are so many distractions in the classrooms", Kehoe says. "I think the teacher should be in control of the technology and so the teacher should be bringing the technology to the classroom". These improvements were mostly demonstrated among the students who were typically "low achieving".