The free coupon programme is deemed as needed now that the government faces budget constraints.
The proposal is also aimed at providing alternative brand-name tablet choices to students and parents.
Under the proposal, a 3,000-baht cash coupon will be given to each student, an amount considered sufficient to buy a tablet with standard specifications for learners.
If parents can afford a higher-capacity device, they can pay the difference themselves.
Tablets in the scheme must support the Android, iOS or Windows operating system.
Anek Ratpiyapaporn, a senior adviser for technology in teaching and learning in the Office of the Basic Education Commission, said the idea is justified now that the Education Ministry has set the new median price of tablets under the scheme this round at only 3,000 baht due to budget constraints.
The coupons will make it unnecessary for the government to conduct another e-auction to procure tablets for students, he said.
The authorities have not yet even finalised details of a new e-auction, said Mr Anek.
Under the fiscal-2014 budget, the Education Ministry will have 4.8 billion baht to supply 1.6 million tablets to Prathom 1 and Mathayom 1 students.
It previously wanted to procure tablets for Prathom 4 and Mathayom 4 students too, but that plan failed to receive parliamentary approval.
Mr Anek said distribution of 1.7 million free tablets to Prathom 1 and Mathayom 1 students under the fiscal-2013 budget remains delayed due to problems in one education zone.
Winners have been named to supply devices for students in the zones 1, 2 and 4 but not yet for zone 3.
Delivery of the first batch of these devices is expected early next month.
Jeerawut Wongpimonporn, the country manager of Lenovo Thailand, agrees with the coupon giveaway, saying it is flexible for students and can save money for parents who already have tablets.
He believes the plan will increase the popularity of Lenovo tablets priced between 6,000 and 9,000 baht over no-name brands from China despite the latter being cheaper by up to 4,000 baht.
The government must recommend qualified tablet brands and models with specifications that support electronic learning content, Mr Jeerawut added.
Jarit Sidhu, a market analyst at IDC (Thailand), said the cash coupon will increase transparency and ease of management better than the e-auction process, considering the large volume of tablets to be distributed nationwide.
The discount coupon will persuade parents to buy higher-quality models valued at 6,000 to 8,000 baht, he said.
In fiscal 2012 and 2013, winners of the One Tablet per Child scheme were dominated by Chinese no-name brand electronic makers from Shenzhen.
The scheme has turned Thailand into the biggest tablet market in Asean.
IDC said the figures for fiscal 2013 are expected to show 5 million tablets worth US$1.2 billion imported.